你送给我桃子，我就回报给你李子。意思是做人要知恩图报，不能忘恩负义。也比喻礼尚往来，相互赠送礼物。

阅读是一种共情的行为。

The most important skill for a programmer is the ability to read code.

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

诗歌是人类存在的唯一具体证明。