你的狗叫不了是因为我。

"In the long run, the only sustainable source of competitive advantage is your ability to learn faster than your competition."

I'm the type of guy that'll take a bullet for mine, and if you cross the line, I'll take yours too.

学习数学的唯一方法就是做数学。

农业效率不是用更少做更多，而是用现有资源做得更好。