A writer's duty is to disturb the peace, to question the unquestionable, to challenge the status quo.
从n对观测值的样本中获得的相关系数的可能误差是sqrt((1-r²)/(n-2))。
The challenge is not to represent Africa, but to present African complexities.
It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied.
我看到了,我忘记了;我听到了,我记住了;我做过了,我理解了。
有时最难原谅的人是自己。
The greatest victories come after the toughest battles.