If you tell the truth, you don't have to remember anything.

柠檬问题发生的原因是卖家比买家更了解产品，从而导致市场失灵。

The historian is both detective and storyteller.

The jaws of power are always open to devour, and her arm is always stretched out, if possible, to destroy the freedom of thinking, speaking, and writing.

学习新编程语言的最好方法是用它编写程序。