n.確認者；驗證者

The marriage was held to be valid. 這一婚姻關系是有效的。

The ticket is valid for one month. 這票子一個月內有效。

A credit card is not a valid proof of identity. 銀行發(fā)的支票保付卡不是有效的身份證明文件。

This license is no longer valid. 這張執(zhí)照不再有效。

The cheque is not valid if it were not signed by the finance director. 如果沒有主管財務的董事簽字支票就無效。

Equal pay for equal work is valid. 同工同酬是正當的。