名词短语
中文翻译：民事法律行为
同义词：
['civil judicial act', 'civil juridical act']
例句：
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1.The contract was signed by both parties during the lifetime of the agreement.
合同是在协议有效期内双方签署的。
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2.The court ruled that the contract was valid and enforceable in the lifetime of the parties.
法院裁定该合同在双方当事人的生期间是有效的且可执行的。
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3. During their lifetime, they made several significant investments.
在他们有生之年，他们进行了几次重大的投资。