【释义】刀能杀人，人们都知道；笔能杀人，人们却未必都知道。

The only way to learn mathematics is to do mathematics.

The most successful modern states are those that have been able to combine a strong state with the rule of law and democratic accountability.

问题的数学表述通常比其解决方案更重要，后者可能仅仅是数学或实验技巧的问题。

团结不是慈善，而是对我们共同人性的认可。

我不是政治家，我是演员。我不必对每件事都有意见。

The way to get started is to quit talking and begin doing.

皮革行业必须发展，以满足环境标准和消费者期望，同时不牺牲质量。