延长: lengthen; extend; prolong; p ...合同: agreement; contract的: 4次方是 The fourth power of 2 i ...有效期: term of validity; period of ...延长合同;延长合同期: extension of agreement合同有效期的延长: extension of a contract合同有效期延长: extension of contract延长合同: extension of agreement延长合同期: extension of agreement延长合同期限: extend the contract period延长有效期: extend expiration date; extend the expiration date; prolong the period of validity有效期延长: extension of availability合同有效期: contract life; contractlife; duration of contract; effective period of contract; period of contract牌照的有效期: duration of licence; licence validity period投标的有效期: tender validity有效期的延长: extension of validity合同有效期间: duration of contract; life of contract合同有效期限: contract life保险单的有效期: validity of policy贷款等的有效期: commitment period委托单的有效期间: time period for which the order will remain outstanding信托基金的有效期: the life of trust fund信用证的有效期限: validity of l/c信用证新的有效期: e new date of expiry信用状的有效期: validity of credit