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巧者劳而智者忧,无能者无所求。
有技巧的人劳累,聪明的人忧虑,没有本事的人没有追求。
The best leaders are those who know how to follow.
We thought that we had the answers, it was the questions we had wrong.
数学不是一项观赏性运动。你必须亲自去做才能理解它。
Don’t let success go to your head or failure go to your heart.