我不是商人，我就是生意本身。

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))。

品质从种子开始，只有最好的才能长成最优质的果实。

The world is full of signs and wonders that come, and go, and if you are lucky you might catch the tail of one as it flies past.

Don’t let your dreams be dreams.