If special clothes are used, they should truly represent a given period.

如果使用特殊服装，那他们应该真正代表一个特定的时期。

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Maitland observed that legal documents are the best—indeed, often the only—available evidence about the economic and social history of a given period.

梅特兰观察到，法律文件是关于某一特定时期的经济和社会历史的最好的——事实上，往往是唯一可用的证据。

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We can find out how much money is spent on food in any given period.

我们可以查明在特定时间内花在食物上的钱有多少。

《牛津词典》

Now here are some differences: the older patients were given adjuvant chemotherapy in weaker doses and for a shorter period of time.

VOA: standard.2010.03.18

That's where you're just asked over a period of time, how often you eat this list of foods and you're given a very long list of foods.

正如同你们刚才问的,你多久吃一次这些食物,你有一个很长的食物列表

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The return, of course, in any given time period is the percentage increase in the portfolio; or, it could be a negative number, it could be a decrease.

当然了，收益率是一定时间内,投资组合的增长率;,也可能是一个负数，表示负增长。

耶鲁公开课 - 金融市场课程节选

All funds available to investors are included at the outset of a given period.

FORBES: Past Winning Funds Fall Again

This number is calculated by simply taking an average of annual returns over a given period.

FORBES: Why Your Investment Returns Could Be Lower Than You Think

This is the cost of goods sold divided by the average value of inventory for a given period.

FORBES: Will The Holiday Shopping Season Be Good for Retailers?