The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
You have to reject one expression of the band first before you get to the next.
一项发明可能价值连城，但对发明者却毫无价值。
Humor is a powerful tool in children's books; it can make serious topics accessible.
The worst thing in the world that can happen to you if you're an engineer that has given your life to something is for someone to rip it off and put their name on it.