理解黑洞就是理解宇宙的结构本身。
Understanding black holes is understanding the fabric of the universe itself.
The bond market is the ultimate indicator of economic health.
The fact is that women have more freedom and opportunity in America today than ever before.
成功就是做你想做的事,在你想做的时候,在你想做的地方,和你想在一起的人,尽情地做。