The ceramic plates of air valves against abration, corrosion, dust, dirt, and sand.

陶瓷阀板耐磨、耐腐蚀、耐固体颗粒侵蚀，寿命长，适合各种气体、液体阀门的密封。

Four years after he graduated from school, Tom decided to dust off his algebra book.

汤姆从学校毕业四年后, 决意重温代数。

The car raised a trail of dust.

汽车掀起了一股土。

Many redskin bit the dust in the battle.

许多印第安人在战斗中丧生。

Her lectures are very useful, but they’re dry as dust.

她讲的课很有用，可是却乏味得要死。

The process treating roast dust from zinc pyrometallurgy is,in general,the second roasting by rotary kiln.

处理法炼锌高温流态化焙烧过程所产的烟,采用回转窑二次焙烧流程。

6 Therefore I reprehend myself, and do penance in dust and ashes.

为此，我收回我所说过的话，坐在灰中忏悔。

There's fluff and dust under the furniture. Please clean it properly.

"家具下面还有一团团的毛和埃,请彻底打扫一下。"

The expulsion of dust from the volcano was visible from miles away.

山喷出的灰几英里之外就能看得见。

His face and hands were coverd with grime from the coal dust.

他的脸和双手都沾满了煤灰和污垢。

There are particles of dust in the air.

空气中有粒。

He whisked the dust off his desk with a cloth.

他用一块布把桌子的灰掸掉。

Nitryl aromatic hydrocarbon affect environment and human health mainly by waste water, dust and smoke.

硝基芳烃主要通过废水、粉、蒸气等形式污染环境，影响人体健康。

The dust was blowing in the streets.

街上土飞扬。

A cloud of dust on the horizon announced the arrival of the cavalryman.

天边扬起的土说明骑兵来了。

Dust on the surface brushes off easily.

表面的灰容易掸掉。

Firstly,the self-swash dust catcher with the unique overfall device was adopted to dedust,desulfate and denitrogena...

此类装置还可应用于矿山、化工和建材等领域中的湿法除。

The carriage left a trail of dust.

马车后扬起了一缕烟。

He casually flicked away some dust from his jacket.

他漫不经心地把夹克上的灰拍掉。

It is difficult to see clearly at dust.

在黄昏时很难看清东西。