I have to remind myself that some birds aren't meant to be caged. Their feathers are just too bright. And when they fly away, the part of you that knows it was a sin to lock hem up DOES rejoice. Still, the place you live in is that much more drab and empty that they're gone. I guess I just miss my friend.

Nature is a book, and each species is a chapter, each species is a story.

过去从未死去。它甚至还没有过去。

每个人都有自己的故事，但并不是每个人都有机会讲述它。

数学的研究就像空气或重力——它无处不在，即使你看不到它。

不仅仅是广告，产品本身也必须有趣。