展开全部 价格的有效期是7天 the price ** valid for seven days 有效期: n.validity indate m**c.period of validity useful life prolong the contract's period of validity;延长合同的有效期 th** film has passed its expiry date. 这个胶卷已过了有效期。for the validity period,make sure to use a period that exceeds the expected life of the application and related applications. 对于有效期,请确保使用超出应用程序本身和相关应用程序预期生命期的时期。希望能帮助到你,记得采纳我的答案! 20210311