The water in the swamp is foul.

沼泽中水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着沼泽。

The surrounding land is low and marshy.

周围地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼木久埋于泥炭沼泽之中树木。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法重型迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽，有水下越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽，有水下越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为中下侏罗统江仓组,成煤环境属中生代断陷盆地内河湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其中河流相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

中水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着。

The surrounding land is low and marshy.

地低洼而多。

Wood that has been preserved in a peat bog.

木久埋于泥炭之中树木。

The piscator is a species of water snake.

草花蛇是在湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、泊和。

In the swamp the army was beset by mosquitoes.

在地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生植物，具有水下越冬芽。

In the swamp we were beset by mosquitoes.

在地里, 我们受到蚊子攻。

The fort flanked on a swamp.

堡垒侧面靠着地。

55 acres of fen.

55英亩。

The swamp teems with mosquitoes.

这片地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生植物，具有水下越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为中下侏罗统江仓组,成煤环境属中生代断陷盆地内河、相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其中河流相、相及泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

沼泽水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着沼泽。

The surrounding land is low and marshy.

周围地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼久埋于泥炭沼泽之。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽植物，具有水越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽植物，具有水越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为罗统江仓组,成煤环境属生代断陷盆地内河湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其河流相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

泽中水很臭。

The old fort flanked on a swamp.

古碉堡一侧泽。

The surrounding land is low and marshy.

周围地低洼而多泽。

Wood that has been preserved in a peat bog.

木久埋于泥炭泽之中树木。

The piscator is a species of water snake.

草花蛇是在泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和泽。

In the swamp the army was beset by mosquitoes.

在泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生泽植物，具有水下越冬芽。

In the swamp we were beset by mosquitoes.

在泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面泽地。

55 acres of fen.

55英亩泽。

The swamp teems with mosquitoes.

这片泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生泽植物，具有水下越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为中下侏罗统江仓组,成煤环境属中生代断陷盆地内河湖、泽。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆,其中河流、泽及湖泊有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

中水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着。

The surrounding land is low and marshy.

周围地低洼而多。

Wood that has been preserved in a peat bog.

木久埋于泥炭之中树木。

The piscator is a species of water snake.

草花蛇是湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和。

In the swamp the army was beset by mosquitoes.

地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生植物，具有水下越冬芽。

In the swamp we were beset by mosquitoes.

地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着地。

55 acres of fen.

55英亩。

The swamp teems with mosquitoes.

这片地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生植物，具有水下越冬芽。例如芦苇（）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

煤地层为中下侏罗统江仓组,成煤环境属中生代断陷盆地内河湖、相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其中河流相、相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

沼泽中水很臭。

The old fort flanked on a swamp.

古碉一侧靠着沼泽。

The surrounding land is low and marshy.

周地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼木久埋于泥炭沼泽之中树木。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽植物，具有水下越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子。

The fort flanked on a swamp.

垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽植物，具有水下越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为中下侏罗统江仓组,成煤环境属中生代断陷盆地内河湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其中河流相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

沼泽水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着沼泽。

The surrounding land is low and marshy.

周围地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼木久埋于泥炭沼泽之树木。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽植物，具有水下越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽植物，具有水下越冬芽。如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为下侏罗统江仓组,成煤环境属生代断陷盆地内湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

沼泽水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着沼泽。

The surrounding land is low and marshy.

周围地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼久埋于泥炭沼泽之。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽植物，具有水越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽植物，具有水越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为罗统江仓组,成煤环境属生代断陷盆地内河湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海型陆相沉积,其河流相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

沼泽中水很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着沼泽。

The surrounding land is low and marshy.

周围地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼木久埋沼泽之中树木。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重型迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽植物，具有水下越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽植物，具有水下越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含地层为中下侏罗统江仓,环境属中生代断陷盆地内河湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西为一套近海型陆相沉积,其中河流相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江中游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。

The water in the swamp is foul.

沼泽很臭。

The old fort flanked on a swamp.

古碉堡一侧靠着沼泽。

The surrounding land is low and marshy.

周围地低洼而多沼泽。

Wood that has been preserved in a peat bog.

沼木久埋于泥炭沼泽之树木。

The piscator is a species of water snake.

草花蛇是在沼泽湿地活动蛇类。

"And triteness kicks us in the nads."

对，陈腐还会把我们踢进沼泽。

They could not move their heavy mortars over the swampy ground.

他们无法把重迫击炮移过那片沼泽地。

On the floor of the basins lie deserts, lakes and swamps.

这几个盆地底部有沙漠、湖泊和沼泽。

In the swamp the army was beset by mosquitoes.

在沼泽地, 该军受到蚊子困扰。

Helophyte A perennial marsh plant that has its overwintering buds under water.

多年生沼泽植物，具有下越冬芽。

In the swamp we were beset by mosquitoes.

在沼泽地里, 我们受到蚊子围攻。

The fort flanked on a swamp.

堡垒侧面靠着沼泽地。

55 acres of fen.

55英亩沼泽。

The swamp teems with mosquitoes.

这片沼泽地蚊子多极了。

Helophyte A perennial marsh plant that has its overwintering buds under water. An example is bulrush(Typha).

多年生沼泽植物，具有下越冬芽。例如芦苇（香蒲）。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为下侏罗统江仓组,成煤环境属生代断陷盆地内河湖、沼泽相沉积。

Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为一套近海相沉积,其河流相、沼泽相及湖泊相有规律地交替出现。

The paper highlighted the existing situation of soil gleying and swamping,thecause and harm of soil waterlogging.

讨论了长江游地区土壤潜育化沼泽化现状,土壤渍害原因及其危害,并总结提出了一些改良措施。

C ajun country: bayous and gumbo, swamps and Zydeco, crayfish (pronounced CRAW-fish) and the Cajun two-step.

法国人后裔乡村：小海湾和秋葵，沼泽和柴迪科舞曲（一种黑人舞曲），小龙虾和她拍圆舞。

It settles the nonce dangersome problem of crossing through the marshland by foot, and is simple in structure and convenient in use.

它解决了目前过沼泽地徒步穿越非常危险问题，且结构简单，使用非常方便。