I've been out of touch with him for years.我与他失去联络已有多年.We've been out of touch with Roger for years now.我们至今已有数年未与罗杰来往了.He is out of touch with reality.他脱离现实....
他把箱子压得狠,把箱子都压破了.He presses the box so hard that it break.别把盒子压破了, 里面有花.Don't crush the box; it has flowers in it.我冲进灌木丛推压破的刷子.I rushed the bush and pushed the crushed brush....
烯空气跟空气十分近似.Olefin gas closely approximates air.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中.All the chief difficulties crop up in the synthesis of the enone ( 1 ).某碳氢化合物已知可能是烯烃或是烷烃.A hydrocarbon was known to be either an alkene or alkane....