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長江大海不會和廢棄水井比較濁清，九霄的雷霆不會和的青蛙蚯蚓比斗誰的聲響響亮。

Stories you read when you're the right age never quite leave you. You may forget who wrote them or what the story was called. Sometimes you'll forget precisely what happened, but if a story touches you it will stay with you, haunting the places in your mind that you rarely ever visit.

最好的數學不僅正確，而且具有啟發性。