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The history of a nation is, in essence, the history of its ruling class.
没有任何一位总统能够忠实地、认真地履行他的职责,还能有闲暇时间。
The more you know, the more you can imagine. The more you imagine, the more you can know.
如果你想飞,就必须放弃拖累你的东西。
Innovation is not about inventing something entirely new, but about improving what already exists.
世界需要更多爱,更少恨。