The key is to keep improving, to keep working hard.

爱情像一棵树，它自己生长，深深扎根于我们的存在。

解读：读书不是单纯为功名利禄，而是在遭遇挫折、低谷时，书中智慧、精神能化作内心支撑，助我们咬牙挺过艰难时刻。

I never look back. I look forward.

银河系的黑洞是我们研究极端引力的最近实验室。

幸福不是现成的东西。它来自你自己的行动。

Each Wal-Mart store should reflect the values of its customers and support the vision they hold for their community.