period of validity是什么意思

用法例句

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.

由于种种原因,当前还没有真正发挥捕捞许可的作用,应从加强渔政执法和完善捕捞许可有效期限规定等方面,真正实施捕捞许可。