youdao

We should analyze the cause and effect of this event.

我们应该分析这场事变的因果。

《新英汉大辞典》

When we say that some event allows an effect, we mean that there is already some tendency for that effect to occur, and event fails to block the effect from happening.

当我们说，某些事件“允许”某些效果发生，我们的意思是说，现在已经有了某些效果发生的倾向，而某些事件未能成功地阻止该效果的发生。

youdao

In effect, they not only observe the event they're reporting about, they're also absorbing it.

VOA: standard.2010.07.01

This week, as pilots at US Airways vote on a temporary contract that will take effect in the event of a merger with bankrupt, approval seems virtually assured.

FORBES: How US Airways Pilot Leaders Found Their Way to Unanimously Back Merger Deal

That is because the money for such spending needs to come from somewhere, and so drains the private sector to the extent of such increased government spending, leaving no net effect in any event.

FORBES: The GOP Jobs Plan Vs. Obama's

They can't say what caused the memory loss and confusion, but it seems to be a class effect and a rare event.

CNN: Statin labels will come with new safety warnings