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Every problem in mathematics has a solution; it's just a matter of finding the right path.
我们这个时代的巨大挑战是创建一个既公正又可持续的世界秩序。
The task of philosophy is not to resolve contradictions but to make them visible.
【讲解】:聪明的人不会疑惑,实行仁德的人会忧愁,真正勇敢的人,不会畏惧。