He had seen them come out and get into the unmarked police car.

他看见他们出来了，进了没有标志的警车。

《柯林斯英汉双解大词典》

It remains to be seen whether or not this idea can be put into practice.

这一想法能否付诸实践还有待于观察。

《牛津词典》

He's seen a pair of antlers, and he's turning into a stag.

他看到了一对鹿角，而且他变成一头雄鹿。

youdao

"This valley of history has seen mankind complete its first evolutionary steps into the universe: leaving the planet Earth and going forward into the universe.

VOA: special.2010.04.28

What do I learn from the period? How？ Remember, you cannot peek into Chapters 6 and 7, because you've seen it before.

我能利用周期得到什么结论,怎么做,记住,你不能跳到第六章和第七章,即使你看过了

耶鲁公开课 - 基础物理课程节选

And you know, sometimes you run into people that you haven't seen in a while, so it's nice.

你知道，有时候你碰上一些好久不见的人，这很好。

有趣的宿舍生活 - SpeakingMax英语口语达人

And I think it coalesced a lot of things that he had seen into, you know, one word.

NPR: Origins Of Bridge To Nowhere Explained

Bicycles, clearly meant for children, can be seen into other images.

CNN: Photographs give a glimpse of Ariel Castro's yard

The deal between Cyprus and its creditors dampened market speculation that the country could be the first to exit the Euro Zone, which triggered a mild unwind of some of the recent safe-haven bid seen into gold prices.

FORBES: Technical Trading: Gold Bulls Stumble After Cyprus Deal, Holding Pattern Seen On Chart