... 苦乐鸳鸯 unlucky double 苦乐原则pleasure-pain principle; pleasurepain principlee 人生的苦乐 the sweet and sour of life ...
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?快乐
快乐-痛苦原则
双语例句
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Bentham arrives at this principle by the following line of reasoning: We're all governed by pain and pleasure, they are our sovereign masters, and so any moral system has to take account of them.