It is best not to do that, but when experimenting, these things can happen, and they can be difficult to clear up.

最好不要这样做，但在实验过程中，这些情况有可能发生，而且清除起来相当困难。

youdao

You can show that if you put a detector on either slit the wave probability function changes but that not explaining why it happens, its just saying this is the way it does happen.

可以向别人展示，如果在任何一条缝旁边放一个检测器，波概率函数会发生变化，但是那并不能解释为什么会发生，它只告诉人们变化就是这样产生的。

youdao

When so many old structures break apart it is not easy for the human being to understand what must happen so that the Earth can be born again.

正当这么多旧有架构崩毁之际，人类很难了解会发生什么事才能让地球重生。

youdao

Not only that,it doesn't mean that because it happens in the United States it can't happen elsewhere."

VOA: standard.2010.06.08

Then, no matter what can happen, it was not me that talked.

NPR: Robert Jordan, Hemingway's Bipartisan Hero

Now if that can happen to me, can it not happen to you?

BBC: Sanjay Dutt: Bollywood's bad boy

We're not there yet, but I'm confident that it can happen -- in part, because it must happen.

WHITEHOUSE: President Obama Holds a Press Conference with King Abdullah II of Jordan | The White House