函数的概念在数学中是基础的，而λ演算提供了一种形式化这一概念的方法。

交易成功的关键是情绪纪律。

Who drives me forward like fate? The Myself striding on my back.

When farmers prosper, communities thrive; when agriculture struggles, societies feel the pain.

今天种下的每一棵树都是留给后代的遗产。

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

最好的歌曲来自于诚实和脆弱的地方。