He who refuses to do arithmetic is doomed to talk nonsense.

满足于少，总比贪得无厌更幸福。

物理学的魅力在于它能够用简单的原理解释复杂的事物。

If you’re changing the world, you’re working on important things. You’re excited to get up in the morning.

采矿业必须发展以满足不断变化的世界的需求。

"The past is always tense, the future perfect."

We must be vigilant in protecting the Internet from those who would misuse it.