Parson Walker's wife was very sick once, for a long time, and it seemed as if they were not going to save her.
VOA: special.2009.08.29
In fact, once you think about it, and not all that long, you can see the answer's got to be no.
事实上,只要你想一想,不用太久,你就会知道答案是否定的
Even there, a horse is not really a rigid body, unless it's been dead for a long time.
马甚至都不是真正的刚体,除非是死了很长时间了
应用推荐