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We learn by teaching.

我们通过教学来学习。

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When I have pointed out one corner of a square to anyone and he does not come back with the other three, I will not point it out to him a second time.

Failures are finger posts on the road to achievement.

Water is the softest thing, yet it can penetrate mountains and earth. This shows clearly the principle of softness overcoming hardness.

Know the enemy and know yourself; in a hundred battles, you will never be defeated.

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