s. without cause
s. unnecessary and unwarranted
a. 免费的, 无理由的
[经] 无代价的
1. The movie was filled with gratuitous violence that added nothing to the plot.
这部电影充满了无意义的暴力，与情节没有任何关系。
2. She received gratuitous advice from strangers who thought they knew better.
她收到了陌生人给予的多余建议，他们认为自己更懂。
3. His gratuitous remarks during the meeting made everyone uncomfortable.
他在会议上无谓的评论让每个人都感到不舒服。