1)period of validity,有效期限2)ticket validity,车、船票有效期限3)contract life,合同有效期限4)ticket availability,客票有效期限5)duration and validity of certificate,证书有效期限6)final date of quality guarantee limit,[农]质量保证最后有效期限
用法和例句
The paper puts forward to strengthen fishery mangement and enforce the law,and to improve the stip ulation of period of validity of fishing license to really put it into effect.