胚胎的性别早在受精时就决定了。The sex of the embryo is predetermined at fertilization.收集母牛胚胎的方法有两种, 一种是直接通过产道, 另一种是施用外科手术.There are two methods of collecting cow embryos -- directly through the birth canal, or surgically.目的: 探索制作小鼠多倍体胚...
The area where most refugees are waiting is exposed to the elements.大多数难民等待救济的地方都不能挡风遮雨。"I have never knowingly exposed any patient to needless risks," he said.他说：“我从未故意将任何病人置于不必要的风险境地。”He has simply been exposed as an a...
The candidates are already limbering up for the election campaign.各候选人已经在为竞选运动热身了.We start by doing limbering up exercises and then go on to do the aerobics.我们先做些柔软运动灵活四肢,再做有氧运动....
山体滑坡掩埋了一栋公寓楼，造成一名7岁男孩丧生。A seven-year-old boy was found dead after a landslide engulfed a block of flats.宾馆后面的那条路大部分被一片公寓楼遮住了。Most of the road behind the hotel was screened by a block of flats.他们居住的地方是坐落于一片钢筋水泥丛林中的12栋高层公寓...
两座房子相距500米。The two houses stood 500 metres apart.圣诞节与元旦之间相距一周.A week intervenes between Xmas and New Year's Day.我们在相距200码处就看到他们.We spotted them at a distance of two hundred yards....