命题是断言某事是或不是事实的陈述。
The happiest people are those who have discovered that happiness is a choice and not a result of circumstances.
数学之美不仅在于它描述世界的能力,还在于它揭示支配世界的隐藏结构的力量。
To write is to make the invisible visible.
The only way to deal with chaos is to embrace it.