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勇气并不总是咆哮。有时勇气是一天结束时那个轻声说"明天我再试一次"的声音。
教育并不像在花园里播种一样在我们身上种植能力;它只是引导它们走向应该走的方向。
Mathematics is the language with which God has written the universe.
Success is not about being the best; it's about being better than you were yesterday.