我无法理解正在发生的事情。

I couldn't get a grip on what was going on.

《牛津词典》

这在全国各校都正在发生。

This is happening in every school throughout the country.

《柯林斯英汉双解大词典》

我们不知道正在发生什么。

We had no idea what was happening.

《柯林斯英汉双解大词典》

And it is moving around and we are sitting on that electron watching it go about its daily affairs.

它正在运动,我们正置身与电子上面,观察它时刻发生的事件。

麻省理工公开课 - 固态化学导论课程节选

it's happening. And I think it's happening, I think it's being sped up by humans, by our interaction.

这是一个正在发生的事实，由于人类的活动，这个进程在加速。

喜欢环境法课程 - SpeakingMax英语口语达人

What's happening right now in the United States - is that the economy is collapsing- maybe that's overstating it.

现如今在美国发生的是,经济正在崩溃-,也许这是夸大这件事。

耶鲁公开课 - 金融市场课程节选