We spend a lot of effort, a lot of time thinking about it for ourselves as well as for others.

我们投入大量努力，大量时间思考自己和他人的快乐。

哈佛公开课 - 幸福课课程节选

For Bentham, all that matters, you'll remember, are the intensity and the duration of a pleasure or pain.

对边沁来说，要记住，真正重要的，是快乐或痛苦的强度和持续时间。

耶鲁公开课 - 公正课程节选