名词
中文翻译：有效期
同义词：
['validity period', "validity term例句：1. The contract hasa term of validity of three years.（合同的有效期限为三年。）2. The agreement is validuntil the end of this month.（该协议有效期至本月底。）3. The company'spolicy only applies during the term of validity.（该公司的政策仅在有效期内适用。）"]
例句：
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1. The contract hasa term of validity of three years.
合同的有效期限为三年。
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2. The agreement is validuntil the end of this month.
该协议有效期至本月底。
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3. The company'spolicy only applies during the term of validity.
该公司的政策仅在有效期内适用。