This is the complete cycle our bodies are naturally geared to undergo within the passage of a twenty-four-hour day.

这是我们的身体在一天24小时内要自然经历的完整周期。

youdao

This is the complete cycle that our bodies are naturally geared to undergo within the passage of a twenty-four hour day.

这是我们的身体在一天24小时内自然调整经历的完整周期。

youdao

Business flourished and within six months they were earning 18,000 roubles a day.

生意兴隆，6个月中他们每天挣18000卢布。

《柯林斯英汉双解大词典》

A "tornado outbreak" is often defined as six or more tornadoes produced by the same weather system within a day.

VOA: special.2010.05.11

So it will be available within a day or two after.

所以会在课后一两天内放到网上。

哈佛公开课 - 幸福课课程节选

The incident probably took place within a day or two of Mister Wesley's observation.

VOA: special.2009.08.25

Some of them reached over one million downloads within a day of being released.

FORBES: It is Very Tough for a New App Publisher to Gain Traction

Within one day of submission of our fake resume, we had a telephone screening call scheduled.

FORBES: Inside The Brains Of A Professional Bank Hacking Team

It had been signed by 32 student union presidents within a day, she told her.

BBC: NEWS | UK | Education | Academics' action splits students