He arrived around five o'clock.

他大约是五点钟到的。

《牛津词典》

Can you finish the work by five o'clock?

你五点钟前能完成工作吗？

《牛津词典》

It must have happened at about five o'clock in the morning.

这件事一定发生在凌晨五点钟左右。

《牛津词典》

This man said at about five o'clock in the morning, he heard the dam collapse and all of sudden the water rushed towards the houses.

VOA: standard.2009.03.27

They were rehearsing for a concert, to be performed at five o'clock this afternoon.

NPR: Adventures Along the Caspian Pipeline

Indeed, at five o'clock on a Thursday afternoon, just as I was leaving, a party seemed to be developing organically.

WSJ: Inside the App Culture

The Five O'Clock Club has developed a couple of exercises that may seem a bit labored but that Wendleton swears by.

FORBES: Magazine Article