If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

你女儿那么痴迷是因为我。

Your dreams are valid, chase them.

大陆并非固定不动，而是像木筏一样在地幔上漂移。