frivolous
adj
1 (of people, their character, etc) not sensible or serious; foolish and light-hearted (指人、 性格等)不明事理的, 不嚴(yán)肅的, 漫不經(jīng)心的, 輕率的, 膚淺的
At 18, he's still rather frivolous and needs to grow up. 他到了18歲仍然很不懂事、 很不成熟.
frivolous comments, objections, criticisms, etc 膚淺的評論、 輕率的反對、 不嚴(yán)肅的批評等.
2 (of activities) silly or wasteful (指活動)無聊的; 浪費的
She thought that reading romantic novels was a frivolous way of spending her time. 她認(rèn)為看浪漫小說是虛度時光.