The exact length of each period may vary.

每一时期的确切持续时间可能有所不同。

《柯林斯英汉双解大词典》

Because each period of life brings its own form of joy and challenge.

因为生命的每个阶段都有它自己的欢乐和挑战。

youdao

Each period of ten days was marked by the appearance of special groups of stars called decans.

每隔10天的周期就会有一些特殊的恒星群出现，这些恒星群被称为 decans。

youdao

The top of each wave was a hill, from which the men could see, for a brief period, a wide area of shining sea.

VOA: special.2010.03.06

Suppose someone has a contract that promises to pay an amount each period over a number of years.

假设某人有一份合约,承诺在数年内的不同时段内分开支付

耶鲁公开课 - 金融市场课程节选

And obviously within this long period many many different ideas and perspectives were involved within each side of conflict.

很明显，很久了,非常多的不同的观点和看法,出现在冲突的双方之中。

普林斯顿公开课 - 人性课程节选

John Tavares, Colin McDonald and Grabner gave New York leads in each period.

WSJ: Orpik's OT goal sends Penguins to 2nd round

This can be corrected with an amended return for each period in question.

FORBES: Dealing with IRS Collection Action

The team identified a clear and significant association between investments in human capital in each period and a country's subsequent growth and labour productivity.

ECONOMIST: A breakthrough in measuring the knowledge economy