The true cost of cheap seafood is paid by the ocean.

里氏替换原则是面向对象编程中的一个基本概念，确保派生类可以替代其基类使用，而不会改变程序的正确性。

我不是说唱歌手，我是一个印加语的传奇。

All men are immortal， but those who are not educated are immortal in a lower and less enviable sense.

I want to be a legend.

投资于环保技术，就是投资于未来。