拿伞的人又拐进了拐角处。The man with the umbrella turned the corner again.她撑开伞，沿着河街向前走。She opens her umbrella, and walks up River Street.他是个经验丰富的跳伞者，已经跳过150多次伞了。He was an experienced parachutist who had done over 150 jumps....
The dedusting efficiency of the electrostatic dust precipitator was enhanced after reform.改造后,电除尘器除尘效率提高.Combustion itself is key to smoke abatement and dedusting.认为消烟除尘必须从燃烧本身入手.Therefore, China has a huge potential mar...