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...
As soon as he got inside, the dog shook himself.他一进来，狗就开始摇头摆尾。They stopped you as soon as you deviated from the script.一旦你偏离了剧本的内容，他们就会喊停。As soon as the two chicks hatch, they leave the nest burrow.两只小鸟一出壳就离开了巢穴。...
舒适公寓中的单间，带屋顶阳台，不抽烟的职业人士，女士优先。Single room in lovely flat, roof terrace, non-smoking prof., woman pref.她像刚开始抽烟的人一样很快地吸着。She was taking quick puffs at her cigarette like a beginner.他们不会让我抽烟的。They wouldn't allow me to s...