But there are different accounts about how this happened.

但对于这次件如何发也有不同言论。

These changes weren't happening in a vacuum.

这些改变并不是凭空出现。

And the long-sought holy grail of ubiquitous voice recognition really will eventually happen.

人们长期以来向往无所不在语音识别最终将成为现实。

Satellite data often tells you what happens after it's happened.

“卫星数据通常在后才会告知你发了什么。”

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

据了解，自从苏联解体之后，这类交易就开始了。

How old was she when this happened?

这件发时候她多大？

Human flow has always happens in human history.

人口流动是人类历史上经常发。

So it's clear that something has happened there.

因此，那里显然进行了军行动。

The FBI is helping investigate how this happened.

美国联邦调查局正就此次袭击展开调查。

Then about seven million years ago something major happened.

接着，大约700万前，某种具有决定意义情发了。

It's been almost a year since that happened.

现在距那起火灾差不多过了一时间。

The Dow plunged 22.6 percent. It had never happened before.

当天，道琼斯指数下跌22.6%。这种情况以前从未发过。

What happened to you this morning? What happened in Kathmandu?

今天早上发了什么？加德满都发了什么？

It's unclear what may have happened to the pilot.

目前尚不清楚飞行员状况。

The plane was returning to base when the accident happened.

故发时，这架飞机正准备返回基地。

Do you realize what could have happened to your son?

你意识到你儿子会怎样吗？

But he is saddened that the connection could not happen sooner.

但令他难过是，这样和解不能早点发。

Or it might seem like nothing's happened.

或者可能会感觉完全无发。

Mr. Biden and his wife were out when the incident happened.

拜登及妻子在案发时没有在家中。

This is a nuclear option. It's never actually happened before.

这是一个核选项。此前从未发过这种。