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The human soul is a fragile thing.
人类的灵魂是脆弱的东西。
No president who performs his duties faithfully and conscientiously can have any leisure.
In science, the credit goes to the man who convinces the world, not to the man to whom the idea first occurs.
勇气并不意味着你不害怕,而是你不让恐惧阻止你。