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大国政治的悲剧在于,即使是善意的国家也被迫采取可能导致冲突和战争的行为。
The elegance of a mathematical proof is in its simplicity and clarity.
我们彼此相连,生物上相连;与地球相连,化学上相连;与宇宙的其余部分相连,原子上相连。
You have to dream big and believe in yourself, because no one else will do it for you.