We don't even think about it in fact, to experience the high and then the low and high and then low.

事实上根本不去思考，自然而然地经历起起落落。

哈佛公开课 - 幸福课课程节选

A life, a fulfilling life, a rich life includes ups and downs, includes pain and getting up again, includes failure and getting up again.

生活，令人满意的生活，丰富的生活包括了起起落落，包括了痛苦和再次振作，包括了失败和再次奋斗。

哈佛公开课 - 幸福课课程节选

And you felt great probably for the rest of the senior year-- I mean, still ups and downs; but overall, high levels of happiness.

可能整个高三都会感觉很棒-,当然难免起起落落;,但总是来说是高水平的快乐。

哈佛公开课 - 幸福课课程节选