valid

US /ˈvæl.ɪd/
UK /ˈvæl.ɪd/
"valid" picture
1.

有效, 合理, 正當

having a sound basis in logic or fact; reasonable or cogent

:
The argument he presented was logically valid.
他提出的論點在邏輯上是有效的。
Her reasons for leaving were perfectly valid.
她離開的理由完全合理
2.

有效, 有法律效力

(of a ticket, document, or agreement) legally or officially acceptable

:
Your passport is only valid for six more months.
你的護照只有效期六個月。
This coupon is valid until the end of the month.
這張優惠券有效期到月底。