adj.不必要的；無緣無故的

Cut out the paragraph unnecessary for the essay. 刪掉論文中不必要的段落。

Critics say, however, that it would create unnecessary new hurdles for users. 批評人士則認(rèn)為，它會給用戶帶來不必要的新障礙。

She blushed and stirred her coffee for no reason. 她臉紅了，然后又無緣無故的攪動著她的咖啡。

I did not want to be singled out for gratuitous punishment. 我不愿意被叫出來遭受這無緣無故的懲罰。