People can be divided into these types: strangers, acquaintances, familiar people, friends, and close friends. True friendship isn't about compliments to your face, but whether you're mentioned when they talk about friends behind your back.

外交需要克服短期利益的诱惑，着眼于长远利益和全球发展。

我不完美，但我一直在努力改进。

量子力学不仅仅是一个理论，它是一种理解现实的方式。