我最有成效的一天之一是删除了1000行代码。

The most important thing in mathematics is to ask the right questions.

一个好的经济学家必须既是科学家，又是人文主义者。

The only way to change behavior is through manipulation of reinforcement contingencies.

To understand the present, we must first confront the past.

在物理学中，真理总是伴随着美。