你能给予某人最伟大的礼物就是你的时间,因为你正在给予他们你生命中永远不会再回来的一部分。
The greatest gift you can give someone is your time, because you are giving them a portion of your life that you will never get back.
Science is the crystallization of human wisdom and an important force driving social progress.
我们拥有的东西就是拥有我们的东西。