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...
So, how studies can accurately prediction to the ducted propeller hydrodynamic performance is more important.所以, 研究如何能更准确地预报导管螺旋桨水动力性能非常重要.Falling raindrops break up through hydrodynamic effects.下落雨滴由于流体动力作用而破碎.On the ba...
他们请求香港允许他们在那里入港停留。They had asked Hong Kong for permission to put into port there.丹尼斯先生说他已经请求使用电话。Mr Dennis said he had requested access to a telephone.他打算请求法庭再重新审度。He intends to ask the court to think again....