当事情发生时你可能不知所措,但这样的当头棒喝也是生活能给予你最美好的事。
You may not realize it when it happens, but a kick in the teeth may be the best thing in the world for you.
Mathematics is a living subject, constantly evolving with new ideas and discoveries.
Extraordinary claims should require extraordinary evidence to be believed.
可持续发展不是一种选择,而是我们对后代的责任。