valid

adj. /ˈvælɪd/ B2

有效的；合理的

Legally acceptable, usable, or based on good reasoning.

仙境例句

The Hatter had a valid ticket for the Queen's great concert, so the guards let him in to sing.

帽匠有一张王后大音乐会的有效入场券，所以卫兵放他进去唱歌了。