Motivation to learn must come from the child; it cannot be artificially imposed.学习的动力必须源于孩子自身，是不可以人为强加的。Scientists believe the frozen eggs stand a good chance of a pregnancy after being artificially fertilised.科学家们相信冷冻卵子...
The feeding of dairy cows has undergone a revolution.乳牛的喂养方法发生了巨大的改变。He was afraid the revolution they had started would fail.他担心他们发起的大变革会遭遇失败。The nineteenth century witnessed a revolution in ship design and propulsion.1...
Money was a commodity she never thought about except in the abstract.钱对她来说就是个抽象的东西，她从不去想钱。I like dogs in the abstract, but I can't bear this one.一般来说我喜欢狗, 可是我不能容忍这一只.Consider the problem in the abstract.就事论事地考虑一下这个问...