A poet's words are the echoes of their soul.

写作是一种对生活的重新理解。

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 most important skill for an economist is the ability to think clearly about trade-offs.

若是有足够的空间，婴儿会爬行去抓取东西。