I'll call you up about seven o 'clock.

我7点钟左右给你挂电话。

《新英汉大辞典》

Dashan: Oh, look. It's seven o 'clock.

大山：哎呀，瞧，都7点了。

youdao

How about tomorrow night at seven o 'clock?

明天晚上七点如何？

youdao

The workers would come into this store at seven oclock in the morning and work until twelve oclock at night.

VOA: special.2010.03.03

Don't forget sections start tonight at seven o'clock and there's another set at eight o'clock and then Friday afternoon at one thirty and Monday morning.

别忘了课后讨论会今晚七点开始,还有几场分别在今晚八点,周五下午一点半和周一上午

耶鲁公开课 - 聆听音乐课程节选

And we get to go home early, you know, six o'clock, seven o'clock, latest, you know.

我们还可以早回家，六点，最晚七点。

比佛利山庄的购物街 - SpeakingMax英语口语达人

He often retires early, and has been known to be in bed by six or seven o'clock in the evening.

BBC: News Online

"It's dark now at seven o'clock so it was the right call not to make the re-start, " the Australian said.

BBC: Drivers back Malaysia abandonment

And from nine o'clock at night until seven o'clock in the morning, the doors at the end of residential corridors are locked.

BBC: Castle Huntly