Language is the only homeland I have.
语言是我唯一的家园。
The harder you work, the luckier you get.
The mind once enlightened cannot again become dark.
A building must be honest in its materials and construction.
外交是一门没有永久朋友，只有永久利益的学科。
创新不是对每件事都说“是”，而是对除了最关键功能之外的一切说“不”。
幽默是与孩子建立联系的最佳方式。
The deepest problems in mathematics often arise from the simplest questions.