你唯一应该试图超越的人就是昨天的自己。
The only person you should try to be better than is the person you were yesterday.
出自北齐·颜之推《颜氏家训·文章》。书写文章要尊崇“三易”的原则,即文章内容要清晰明了,这是第一项。书写的文字要简单概要,这是第二项。书写的段落要读起来朗朗上口这是第三项。
数学的美在于它能够以最简单的术语描述宇宙。
Why should a dog, a horse, a rat, have life, and thou no breath at all?