人类有一件真正有效的武器，那就是笑声。
The human race has one really effective weapon, and that is laughter.
所有的暴力都是可悲刻板印象的例证。
The deepest theorems in mathematics often have the simplest statements.
不要等待完美的时刻。抓住这一刻，让它变得完美。