释义：如果人与人之间的关系是建立在利益之上的，那么一旦利益消失，两人的关系也会变得疏远。

The historian's task is to resurrect the voices silenced by time.

When you solve a mathematical problem, you don't just get the answer - you understand why it's the answer.

成功来自于坚持和努力。

大胆梦想，从小事做起。