On pivoting: "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."
大西洋两岸大陆的契合，是大陆漂移理论最引人注目且最关键的验证。
Technology is nothing if it doesn't solve real problems.
