自守形式的研究是数学思想深度的反映。

I must confess that I never could see any beauty in her. Her face is too thin; her complexion has no brilliancy; and her features are not at all handsome. Her nose wants character; there is nothing marked in its lines. Her teeth are tolerable, but not out of the common way; and as for her eyes, which have sometimes been called so fine, I could never see anything extraordinary in them.

The key to trading success is to have a plan and stick to it.

有时候问题很复杂，但答案却很简单。

我不是为了生活而唱歌，我是为了唱歌而生活。