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The path to sustainability is paved with both challenges and opportunities.
The human being cannot live in a condition of emptiness for very long: if he is not growing toward something, he does not merely stagnate; the pent-up potentialities turn into morbidity and despair, and eventually into destructive activities.
解析:君子要求的是自己,小人要求的是别人。
作曲家的传记写在他的乐谱中,而不是在他的信件或日记里。
A story is not a lie, but neither is it the truth.
一个好的数学家是能看到定理之间类比的人;一个伟大的数学家是能看到类比之间的类比的人。