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The significance of a mental state lies in what it leads to.
Resource development must balance economic benefits and ecological protection to achieve sustainable development.
I believe that art can be a powerful tool for social change.
如果一个国家期望在国民无知的情况下却拥有自由,那么这种期望无论在历史上,还是未来都绝不会实现。如果我们打算抵御无知和捍卫自由,每位美国人都有责任了解一件公共事务的来龙去脉。