But once it happens, it's always there.

一旦情节发生了，它就一直在那儿了。

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And once it happens, you can constantly market and sell your products to them.

而且一旦发生，你可以不断的市场和销售产品给他们。

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Once it happens, the way of reconsideration or suit is exclusive to solve it according to the traditional tax theory.

一旦发生争议，按传统税法理论只能通过复议或诉讼的方式需求救济。

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We have a couple of passages, one in the book of Numbers, one in the book of Job, which describe this condition in a way that identifies it with death. An aborted fetus is often not often, it happens once in the book of Job.

有两篇文章，一篇在《民数记》,一篇在《约伯记》里，描述了这种,意味着死亡的状况，比如说，一个被流产掉的胎儿就,但这些例子不多，只在《约伯记》里出现了一次。

耶鲁公开课 - 旧约导论课程节选

We have, for example, bomb drills just in case something happens people think it's right When thing happens once and you move on, go back to life, just as something goes wrong and then you move on.

例如，我们有，炸弹演习以防发生什么事情,人们认为这是应该的,发生了一件事，你要继续正常的生活，正如某事出了点问题，然后你继续前行。

普林斯顿公开课 - 人性课程节选

Since what actually happened is so obvious once it happens, we overestimate how obvious it was before it happened.

CNN: Why FBI and CIA didn't connect the dots

"It's the hallmark of immune therapy--it doesn't happen often, but once it happens, those patients live years, " says UCLA oncologist Antoni Ribas.

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If it only happens once in the next 10 years, it will be an improvement.

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