工具变量的美妙之处在于它们让我们以新的视角看世界。

The most important thing in the programming world is to keep learning and practicing.

要理解一个生命，必须先理解它所处的时代。

If you can make meat directly from plants, why would you need an animal?

All things are subject to decay and when fate summons, monarchs must obey.

每个人都像月亮，总有一面从不示人。

科学不仅仅是关于事实；它是关于事实背后的故事。

There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies.