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And when your stomach is empty and your mind is full,it's always hard to sleep.
We don't inherit the oceans from our ancestors; we borrow them from our children.
对于已经发生的事,感谢它;对于将要发生的事,说“是”!
In mathematics, the simplest questions often lead to the most profound discoveries.
我相信我们都应该追随我们的激情,做让我们快乐的事情。