n.确认者；验证者
The marriage was held to be valid. 这一婚姻关系是有效的。
The ticket is valid for one month. 这票子一个月内有效。
A credit card is not a valid proof of identity. 银行发的支票保付卡不是有效的身份证明文件。
This license is no longer valid. 这张执照不再有效。
The cheque is not valid if it were not signed by the finance director. 如果没有主管财务的董事签字支票就无效。
Equal pay for equal work is valid. 同工同酬是正当的。
