The probable error of a correlation coefficient is not a thing which can be deduced from first principles, but must be found empirically.
相关系数的可能误差不是可以从第一原理推导出来的东西,而是必须通过经验找到的。
你活得越充实,就越不害怕死亡。
克服困难就是赢得机遇。
我不能把你许配给任何不那么值得的人。
Patience in research is not passive; it's an active commitment to truth.
The laser is to attosecond physics what the telescope was to astronomy.