The staff in al Jazeera's Arabic and English newsrooms had, as it happened, undergone intense social-media training only the month before.

就在这个事件发生的前一个月，半岛电视台阿拉伯语和英语新闻编辑室的工作人员，刚刚进行了社交媒体紧急培训。

youdao

It had never happened before.

以前从不曾发生这种事情。

youdao

As it happened, Mr Zimmerman had developed a "data glove" some years before, with the intention of using it to mould virtual pottery.

巧合的是，Zimmerman几年前开发出了一个“数据手套”，想用它来烧制虚拟陶器。

youdao

The second great reform era is the Progressive Era, a great response to urbanization, industrialization and immigration, as it had never quite happened before.

第二个时期是进步时期,对于城市化的大力响应,工业化和移民入境,这是之前从未有过的

耶鲁公开课 - 美国内战与重建课程节选

Okay. So what happened next was he then started to run that faster, twice as fast as it had been before, changing rate of harmonic pattern. Okay?

好的，比以前的快两倍，比以前的快两倍，改变了泛音的方式，改变了泛音的方式，对吧？

耶鲁公开课 - 聆听音乐课程节选

Just imagine the difference it could have made for small businesses and our economy had it happened months before.

WHITEHOUSE: President Obama on September, 2010 Jobs Numbers

One told me that it had actually happened two weeks before the announcement claimed.

NEWYORKER: The Kingpins

He said a cup containing the drug was sometimes kept on top of the wardrobe in their bedroom but had been moved on that occasion so it was more convenient for Ms Dent, something which had not happened before.

BBC: Riley Pettipier