泵的抽气速率与气体的性质有关.Lashing velocity of pump is concerned with nature of air.现在已经采用了低温吸附技术和吸气离子泵的近代电子抽气设备.Recent electronic means of pumping using low temperature sorption techniques and getter - ion pumps have been introduce...
大家经过多少年的努力, 才取得今天的成绩.Through years of our painstaking efforts, we have at last achieved what we have today.我认为这是儿童和少年的共同癖性.I believe this is a common habit of children and adolescents.他在 三十二 岁时还一直装扮作少年的样子.He remained a s...
the glitz and glamour of the music scene表面光辉灿烂的乐坛It was Fred's lust for glitz and glamour that was driving them apart.是弗雷德对浮华、奢靡生活的强烈欲望使他们越走越远。He is a master of glitz.他是摆浮华场面的高手....