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"The human voice is the most powerful instrument of all."
剑鞘保护剑的锋利,自己却满足於它自己的迟钝。
Man is the measure of all things.
旅行的用途是用现实来调节想象力,而不是想象事情可能是怎样的,而是看到它们实际是怎样的。
The process of solving a mathematical problem is often more important than the solution itself.