Infectious diseases are spreading among many of the flood victims.传染病正在遭受洪灾的很多灾民中蔓延。You might say that we've been victims of circumstance.你可以说我们一直不走运吧。Rescue workers are digging through the rubble in search of other...
He noticed that fabric was tearing away from the plane's wing.他注意到机翼在一块一块地断裂。Never dry underwear over direct heat; it will weaken the fabric.不要直接加热烘干内衣，那样会损坏布料。The fabric is strong enough to withstand harsh processi...
方法: 用溴代及胺化反应合成了四甲基吡嗪衍生物.METHODS: The target compound was prepared by the bromination and amination reaction.论述了三丙酮胺纯度对加氢和还原胺化反应的影响.The effects of triacetoneamine concentration on hydrogenation and amination were discusse...
志愿者记录下他们一周所吃的所有食物。The volunteers kept a record of everything they ate for a week.新的饮食类书籍差不多一周出一本。New diet books appear at a rate of nearly one a week.他们在一周内就画出了房子的图样。They drew up the design for the house in a week....