You must submit your claim within a reasonable time.

你必须在适当的时间内提出要求。

《牛津词典》

Your goal should be attainable within a reasonable time frame.

你的目标应该是一个合理的时间框架内实现的。

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Should you not collect it within a reasonable time, we may charge you a storage fee.

如果您未在合理的时间内领取，我们将向您收取保管费。

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The required written notice must be given to the worker within a reasonable time after entering into a contract.

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You must return any excess reimbursement or allowance within a reasonable time period.

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They must get rid of remaining protectionism, within a reasonable time frame, and discuss a broader agreement facilitating investment everywhere.

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