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))。

有时你必须冒险才能打出精彩的操作。

真相很少是纯粹的，也从不简单。

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 health of our oceans reflects the health of our planet. We must act now to protect both.

人的一生，必然要经过苦、乐磨炼；在苦难中练就的幸福，才最为长久。