The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.

Innovation is not about working behind closed doors; it requires open cooperation and integrating global resources.

心灵是一个积极、动态的过程，而非被动的容器。

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森林的真正价值不能仅用板材英尺来衡量。