The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
The time for debate is over; the time for action is now.《Blue Horizons》
相关系数的可能误差不是一个固定的量,而是取决于样本的大小。
没有比你自己设下的陷阱更致命的陷阱了。