我正在等几封重要的信件，可是一封都没到。I am expecting several important letters but nothing has arrived.我们把手探进一袋信件中抽取获奖者。We delved through a sackful of letters to draw the winning name.他们主张采取向四处随意邮寄大量信件的方式。They advocated a scattergun appro...
Determinations of neurotransmitters in rat brain microdialysates using microbore liquid chromatography with electrochemical are described.报道了使用微柱色谱和电化学检测器测定鼠脑微透析液中神经传递物质的方法....
这些公司需要短暂休整才能恢复元气。Firms need a breathing space if they are to recover.经历了这场特大洪水,当地人民元气大伤,很难恢复.The floods were a cataclysm from which the local people never recovered.海湾战争使伊拉克大伤元气.Iraq has been drained of its strength by t...