Gravitational waves are a new way of observing the universe, allowing us to hear the cosmos.

无论是个人还是国家，只要生活节俭，就会繁荣昌盛；如果贪图享受，放纵欲望，那就会走向衰亡。

The old believe everything, the middle-aged suspect everything, the young know everything.

It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.

If you can't explain it simply, you don't understand it well enough.