There was a whine of hydraulics as the undercarriage locked into position.随着液压系统嘎吱一声响，起落架进入了锁定位置。The undercarriage on light aircraft does not always retract in flight.轻型飞机飞行时起落架不一定缩回.A kind of cutter undercarriage mechan...
Edison won his spurs as an inventor while rather young.爱迪生很年轻的时候就获得了发明家的声誉.This young man is very clever; he may be another Edison.这个年青人很聪明, 他可能成为爱迪生式的人.This invention is ascribed to Edison.这项发明被认为是属于爱迪生的....
十八岁时她在莉芝饭店的大宴会中初次作社交性的露面.At 18 she made her debut at a big party at the Ritz.为了某人或某事而举行的一次正式宴会或大宴会.A banquet or formal meal in honor of a person or an event....
It was snowing hard by then.当时雪下得很大。After it had stopped snowing, we all went sledging.雪停了以后我们全去坐雪橇玩.Ordinarily It'should be snowing at this time of the year.按说这时候该下雪了....
Water soluble hydroxypropyl � � cyclodextrin was converted to acetonyl hydroxypropyl � � cyclodextrin via selective oxidation.通过选择性氧化,将水溶性优良的羟丙基β环糊精转化为丙酮基羟丙基β环糊精....