The key to success is to keep trying, even when things don't work out the first time.

可持续发展的关键是平衡经济增长和环境保护。

Every sentence I utter must be understood not as an affirmation, but as a question.

The arithmetic of algebraic groups is a central theme in the Langlands program.

我不知道市场会怎样。我只是尽量买便宜的东西。