Dyes come from plants or from chemicals.

染料是从植或化中得来的。

These chemicals are practically insoluble in water.

这些化几乎不溶于水。

Have you studied the composition of the chemicals?

你研究这种药品的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以些化药品加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

些化药品很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把些化撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

这些化品使这种水果不宜食用。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经化处理之后再度使用。

Chemicals are used to keep the insects down.

化药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种化加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的化废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应的。

Dyes come from plants or from chemicals.

染料是从植物或物质中得来的。

These chemicals are practically insoluble in water.

这些物质几乎溶于水。

Have you studied the composition of the chemicals?

你研究过这种药品的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的元素，符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上课时把药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以通过某些药品加以抑。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某些药品很容易溶于血液, 有些则行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某些物质撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

这些品使这种水果用。

As chemical reagent and corrodent of integrated plate.

作试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经过处理之后再度使用。

Chemicals are used to keep the insects down.

药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

改性主要有氧、交联、酯和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种物质加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催剂是一种能加速反应的物质。

Dyes come from plants or from chemicals.

染料是从植物或化物质中得来的。

These chemicals are practically insoluble in water.

些化物质几乎不溶于水。

Have you studied the composition of the chemicals?

你研究过种药的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以通过某些化药加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某些化药很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某些化物质撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

些化种水果不宜食。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经过化处理之后再度。

Chemicals are used to keep the insects down.

化药于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把种化物质加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的化废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应的物质。

Dyes come from plants or from chemicals.

染料是从植物或化物质中。

These chemicals are practically insoluble in water.

这些化物质几乎不溶于水。

Have you studied the composition of the chemicals?

你研究过这种药品成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞以通过某些化药品加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某些化药品很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某些化物质撒在云层上以人工造雨方法。

These chemicals make the fruit inedible.

这些化品使这种水果不宜食用。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成电路电镀板消蚀剂。

The same water was reused after chemical treatment.

原水经过化处理之后再度使用。

Chemicals are used to keep the insects down.

化药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种化物质加盐分离出并让它干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出化废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应物质。

Dyes come from plants or from chemicals.

染料是从植或化中得来的。

These chemicals are practically insoluble in water.

这些化几乎不溶于水。

Have you studied the composition of the chemicals?

你研究这种药品的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以些化药品加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

些化药品很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把些化撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

这些化品使这种水果不宜食用。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经化处理之后再度使用。

Chemicals are used to keep the insects down.

化药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种化加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的化废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应的。

Dyes come from plants or from chemicals.

染料是从植物或化物来的。

These chemicals are practically insoluble in water.

这些化物几乎不溶于水。

Have you studied the composition of the chemicals?

你研究过这种药品的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变过某些化药品加抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某些化药品很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某些化物撒在云层上人工造雨的方法。

These chemicals make the fruit inedible.

这些化品使这种水果不宜食用。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经过化处理之后再度使用。

Chemicals are used to keep the insects down.

化药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥料应该均匀地混入土壤。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种化物加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的化废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应的物。

Dyes come from plants or from chemicals.

染料是从植物或物质中得来的。

These chemicals are practically insoluble in water.

这些物质几乎不溶于水。

Have you studied the composition of the chemicals?

你研究过这种药的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的元素，符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上课时把药放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以通过某些药加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某些药很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某些物质撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

这些使这种水果不宜食。

As chemical reagent and corrodent of integrated plate.

作试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经过处理之后再度使。

Chemicals are used to keep the insects down.

药于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

改性主要有氧、交联、酯和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种物质加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催剂是一种能加速反应的物质。

Dyes come from plants or from chemicals.

染料是从植物或化物质中得来的。

These chemicals are practically insoluble in water.

这些化物质几乎不溶于水。

Have you studied the composition of the chemicals?

你研究过这种药品的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以通过某些化药品加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某些化药品很容易溶于血液, 有些则不行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某些化物质撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

这些化品使这种水果不宜食用。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成路板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经过化处理之后再度使用。

Chemicals are used to keep the insects down.

化药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥料应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种化物质加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的化废料污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应的物质。

Dyes come from plants or from chemicals.

染是从植物或化物质中得来的。

These chemicals are practically insoluble in water.

这化物质几乎溶于水。

Have you studied the composition of the chemicals?

你研究过这种药品的成分了吗?

Semimetallic chemical element, chemical symbol B, atomic number 5.

半金属的化元素，化符号B，原子序数5。

We put chemicals in test tubes in our chemistry class.

我们上化课时把化药品放进试管里。

The fission of the cell could be inhibited with certain chemicals.

细胞的裂变可以通过某化药品加以抑制。

Certain chemicals are easily absorbed into the bloodstream, while others are not.

某化药品很容易溶于血液, 有行。

Now scientists have learned to make rain by salting clouds with certain chemicals.

如今, 科家已经掌握了把某化物质撒在云层上以人工造雨的方法。

These chemicals make the fruit inedible.

这化品使这种水果宜食用。

As chemical reagent and corrodent of integrated plate.

作化试剂和集成电路电镀板的消蚀剂。

The same water was reused after chemical treatment.

原来的水经过化处理之后再度使用。

Chemicals are used to keep the insects down.

化药品用于阻止昆虫滋生。

Choice having introduced the hammerhead and cleading chemical composition.

介绍了锤头和衬板化成分的选择。

What are the chemical reaction characteristics of tropane alkaloids?

氢溴酸东莨菪碱的鉴别原理是什么？

The chemical fertilizer should be well dug in.

化肥应该均匀地混入土壤中。

Chemical modification including oxygenation, esterify, graft copolymerization and so on.

化改性主要有氧化、交联、酯化和接枝共聚。

The chemical must be salted out and allowed to dry.

必须把这种化物质加盐分离出来并让它变干。

The soil has been poisoned with chemical waste from the factory.

土壤被从工厂排出的化废污染了。

The heat brings about a chemical reaction, and oxygen is liberated.

热量引起化反应, 释放出氧气。

A catalyst is a substance which speeds up a chemical reaction.

催化剂是一种能加速化反应的物质。