It is one of the most saddening things in life that, try as we may, we can never be certain of making people happy, whereas we can almost always be certain of making them unhappy.
这是生活中最令人悲伤的事情之一，尽管我们尽了最大的努力，但我们永远不能肯定能让人们幸福，而我们几乎总是能肯定能让他们不幸福。
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