花些时间，只用一天一次，让你自己感觉良好，并且提醒自己要为自己的快乐负责。

Take a moment, just once a day, to make yourself feel good, and remind yourself that you're responsible for your own happiness.

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公司管理层经常认为，过程是只用书写一次，之后完全准照的东西。

Too often company management thinks of process as something that is written down once and then simply followed.

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一些院子里的和改善住宅的工具往往只用一次或是一小段时间。

Some yard equipment and home improvement tools get used only once or once in a while.

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Milton will only use the word career once in his poetic oeuvre and it comes -- it will come pretty soon, actually, in Sonnet Number Seven.

弥尔顿在他的全部诗歌作品中只用过一次事业这个词,我们马上就会看到，在十四行诗的第七行。

耶鲁公开课 - 弥尔顿课程节选