每一个剪辑都应该有一个目的，一个存在的理由。
Every cut should have a purpose, a reason to be there.
The search for reciprocity laws is a fundamental theme in the history of mathematics.
When you focus on doing what's right rather than what's easy, success follows naturally.
投资清洁煤炭技术不是开支，而是对我们未来的投资。
我们不仅仅是生产药物，我们生产的是信任。
富贵如住宿旅店，只有谨慎勤劳才可以久居；贫贱如破衣服，只有勤俭才能脱去贫穷的破衣。