过去从未消逝，它甚至还未过去。
"The past is never dead. It's not even past."
Our relationships with others are mirrors that reflect our own inner world and psychological state.
I'm not a legend, I'm just a man who became one.
No matter what difficulties I encounter, I will continue to sing.
The best way to learn econometrics is by doing—working with real data and real problems.
改变的秘诀在于集中所有精力，不是对抗旧事物，而是建立新事物。