I heard what might have been an explosion.

我听到的可能是爆炸的声音。

《柯林斯英汉双解大词典》

They heard what sounded like a huge explosion.

他们听见了一种像是巨大爆炸的声音。

《柯林斯英汉双解大词典》

As soon as he heard what was afoot, he telephoned his German and Italian counterparts to protest.

他一听到在进行中的事，马上就给德国和意大利相应人员打电话抗议。

《柯林斯英汉双解大词典》

The salesman was afraid when he heard what sounded like the mountain breaking.

VOA: special.2009.02.21

He said...you heard what he said.

他说的你也听到了。

耶鲁公开课 - 公正课程节选

I heard that young rich people try to get apartments on the Upper West Side area. What do you think about that?

我听说富有的年轻人想在上西区买所公寓。你对这个现象怎么看？

上西区的富人 - SpeakingMax英语口语达人

Victoria Dehel, who lives four houses away, said she heard what sounded like fighting.

WSJ: Cops investigating after NY college student killed

At the Paris airshow on Monday the aviation industry heard what progress had been made.

BBC: NEWS | UK | Northern Ireland | Details on plane plans revealed

And, Greg, we've just heard what the new board wants to stop doing in Dover, Pennsylvania.

NPR: Intelligent Design in American Classrooms