也就是说，我们可以只用一次努力或一个动作完成两个目的。
That is, we can complete two goals with only one effort or action.
相互之间具有排他性：每一个论点是否只用一次并用在最适当的位置？
Mutually exclusive (ME): Is each point used only once and in the best place?
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.
但是，上一次我只用了两个月，它就坏了。
But still, I only had the last one two months, and it broke.
汤姆的第二台电脑出毛病了，尽管他只用了一次。
Tom's second computer went wrong although he used it only once.
虽然我们只用了一次干细胞，但过程却非常有效。
The procedure was quite effective even though we applied the stem cells just once.
关闭视频现在也只用点击一次就可以了。
Closing the video is now much simpler – just a single click.
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.
只用服用一次以后就感觉很有效。
方明：是的，我只用了一次就坏了。
方明：是的，我只用了一次就坏了。
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