gratuitous

他的演讲充满了不必要的粗俗笑话。

His speech was full of ___gratuitous vulgar jokes.

观众批评导演对受害者伤口的近距离特写毫无必要。

Viewers criticized the director for the ___gratuitous close-ups of the victim's injuries.

经理对她穿着的无关评论与她的工作表现毫无关系。

The manager's ___gratuitous remarks about her clothing had nothing to do with her work performance.