Most of them just stared at her in perplexity.他们多数人茫然地凝视着她。She looked at us in some perplexity.她有点困惑不解地看着我们.He scratched his head in perplexity.他困窘得直抓头皮....
Men in green army uniforms are sprinkled throughout the huge auditorium.穿着绿色军服的人星星点点地分布在整个大礼堂中。The teacher gathered all the pupils in the auditorium.老师把全体同学集合在礼堂内.We'll have the meeting in the classroom rather than ...
The cerusite can be collected by xanthate without sulfuration, however the flotation indexes are not good.在不硫化的条件下,黄药能够浮选白铅矿, 但浮选指标不高.Expounds liquid level control system of flotation machine and its industrial test.介绍浮选...