检验统计假设的问题是估计的一般问题中不可分割的一部分。
世界是一个非常复杂的地方,而且它并没有变得简单。
绘画是我的梦想,电报则是我的噩梦。
The thing that we are trying to do at Facebook, is just help people connect and communicate more efficiently.
【译文】走路遇到危险处尚能回避一下,麻烦事临到头上就由不得自己了。
A penny earned is a penny saved.
"To write is to breathe, to live, to exist in a world of one's own creation."