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。
I love challenges because they make me grow.
唯一具有持久重要性的自由是智慧的自由,也就是说,为了本质上值得的目的而行使的观察和判断的自由。
You have to be passionate about what you do, otherwise it's not worth it.
"We are all the heroes of our own stories."