这一新技术已经被用来鉴别胎儿的性别。The new technique has been used to identify the sex of foetuses.鉴别坠机意外伤亡者的工作费时而且困难重重。The identification of the crash victims was a long and difficult task.他们做了这副牙的石膏模型作鉴别之用。They took a plaster cast of t...
They have the usual quota of human weaknesses, no doubt.毫无疑问，他们身上也有人所共有的弱点。There was no doubt in his mind that the man was serious.在他看来，这个人无疑是认真的。I have no doubt that we are polluting the environment beyond redemption.我丝...
When hostilities broke out he returned to England and joined up.战事爆发之后，他回到英格兰参军了。Is he really considering a renewal of hostilities at this stage?他真的在考虑在这个阶段恢复敌对状态吗？Mexico called for an immediate cessation of hostilities....
Oil - yielding organic matter is contained in the shales.在这些页岩里有产油的有机物质.Thus clays and shales tend to be impermeable.因此粘土和页岩就往往不透水.Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.Alternating sandstones and...