helping the children of poor and needy parents帮助来自贫困家庭的孩子A young man idle,an old man needy.少时闲混,老来穷困。Idle young, needy old.少壮不努力，老大徒伤悲。He deems it his duty to help his needy friends.他认为帮助穷朋友是他的义务.It behooves us to help t...
养蚕是为了得到蚕丝.Silkworm culture is practised in order to get silk.在蚕丝中, 更确切地讲,这些链是反向平行的.In silk, it would be better to describe the chains as being antiparallel.请描述蚕丝与蜘蛛丝的分子结构.Describe the molecular structures of silk and the...
河流转向东流时河道大幅度变宽。The river widens considerably as it begins to turn east.小路在和公路相交的地方变宽了。The track widened as it met the road.过了一会儿,路变宽了,他们也走得更快了.After a while the road opened up and they traveled more quickly....