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一個人只要能夠生活就感到滿足的話，他就會生活的很愉快。我們愈不知道忍受，我們愈感到痛苦。

If we don’t do something now, the world our children inherit will be much poorer than the one we were given.

Every experiment, even the ones that fail, teaches you something valuable.

出自《海國圖志序》。學習外國的長處用來征服外國。