质量不是一种行为，而是一种习惯。
Quality is not an act, it is a habit.
The past is never dead. It's not even past.
Data tells you what's happening, but only intuition can tell you why.
The Milky Way’s black hole is our closest laboratory for studying extreme gravity.
That's because most jokes are lies, and you're single - minded in your pursuit of the truth.
