净化

• A second method is to use a clean-air hood at the loading station .
  另一种方法是在操作台用净化空气罩。
• The rain had cleared the air , and the grass smelt fresh and sweet .
  雨水净化了空气，青草闻起来清新芳香。
• A well-established branch of chemical engineering is that of gas cleaning .
  化学工程中已确定的一个分支是气体净化。
• One of the ways to purify water is to make it spew slowly from the soil .
  净化水的方法之一是让它从土中慢慢地渗出。
• The high level of hc in the exhaust gas may damage the catalytic converter .
  废气中大量的HC会损坏催化式排气净化器。
• Control of these emissions by adequate gascleaning processing is essential .
  采取有效的气体净化方法以控制这些放散物是十分重要的。
• Detergent use will not eliminate a possible need for exhaust fans and air scrubbers .
  采用净化剂并不能排除设置排气风扇和空气洗涤器。
• The air guards the catalytic converter from overload and possible resulting damage .
  空气防止了催化式排气净化器的过载及可能产生的损坏。
• The second advantage is that combined treatment enhances the biological waste treatment processes .
  第二个优点是，联合处理促进了生物净化过程。
• Another reason for banning lead in gasoline is that the lead can ruin the catalytic converter .
  禁止汽油里含铅的另一个原因，是铅能损坏催化式排气净化器。