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生活是愉快的。死亡是平静的。麻烦的是过渡阶段。
Life is pleasant. Death is peaceful. It's the transition that's troublesome.
The goal of education is not to increase the amount of knowledge but to create the possibilities for a child to invent and discover, to create men who are capable of doing new things.
Mathematics is a universal language that transcends cultural and linguistic barriers.
任何优秀的飞行员,无论他有多么高的天赋和丰富的经验,都不会不使用检查表。