These changes weren't happening in a vacuum.

些是凭空出现的。

But there are different accounts about how this happened.

但对于次件如何发生也有同的言论。

Alas, just because something is irrational does not mean it will not happen.

然而，有些即使合理，还是会发生。

Human flow has always happens in human history.

人口流动是人类历史上经常发生的。

And that doesn't happen by cramming.

但是死记硬背能实现一过程。

Oh, no, no, no. What a thing to happen.

哦，。可糟了。

And there are many points where their failure happens.

失败的因素出现在各个环节。

The building was being demolished when the collapse happened.

座大楼在拆除过程中倒塌。

To put it simply, everything happens instantaneously.

简单来说一切都会在瞬间完成。

All these things can happen to anyone, and they happen to everyone.

所有一切都可能发生在任何人身上，也确实发生在每一个人身上。

It suggests that the work is happening.

表明工作正在进行。

Without it, the competition could not happen.

如果它们没有招，个比赛也没啥比的。

Those changes didn't happen on their own.

些是自动发生的。

I think that this happens since March.

我认为是从 3 月份开始的。

How old was she when this happened?

件发生的时候她多大？

That's thought to have happened after breakup of the Soviet Union.

据了解，自从苏联解体之后，类交易就开始了。

But I'll give you a hint why this is happening.

但我会给你们一点提示， 为什么会发生样的。

I realised clearly that something extraordinary was happening.

我清楚地意识到某些寻常的情要发生了。

I was waiting for a miracle to happen.

我在等待一个奇迹的发生。

Of course, it doesn't happen like that.

种情况当然会发生。