"我不是一个词，我是一种语言。"

科学研究要解决实际问题，不能只停留在论文上。

我不相信运气，我相信努力。

我认为最重要的是对自己和观众诚实。

The concept of legal obligation is central to the understanding of law.

There is no doubt that in exchanging a self-centered for a selfless life we gain enormously in self-esteem. The vanity of the selfless, even those who practice utmost humility, is boundless.

The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your own mind.