The only way to learn mathematics is to do mathematics.
科学不仅仅是发现新事物，还包括提高世界各地人们的生活质量。
过度捕捞是短视行为，我们必须为子孙后代留下丰饶的海洋。
The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt, and the profoundest wisdom to know when it ought to be resisted, and when it be obeyed.
"I’m very proud of my weight. I’m never going to be a size zero and I don’t want to be."
你能做的最好的投资就是投资自己——你的教育、技能和个人成长。