Temporary tariff rate may be applied to imported goods within a specified period of time.

对进口货物在一定期限内可以实行暂定税率。

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For the first time they were required to attain air quality of specified standards, within a specified period of time.

这是第一次要求各州的空气质量在一段具体时间内达到具体的标准。

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Tech Universe reserves the right to limit the frequency of Tours provided to any organization within a specified period of time.

科技寰宇有权限制任何团体在某一时段内的參观次數。

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When you use credit, you are borrowing money that you promise to pay back within a specified period of time.

FORBES: The Importance Of Your Credit Rating