valid

形容词 valid:

1. well grounded in logic or truth or having legal force
2. still legally acceptable

1. A valid objection.
   有根据的反对
2. 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。
3. The marriage was held to be valid.
   这一婚姻关系是有效的。
4. 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。