frivolity

1. N-VAR If you refer to an activity as a frivolity, you think that it is amusing and rather silly, rather than serious and sensible. 轻松的乐事

There is a serious message at the core of all this frivolity. 所有这些轻松乐事的核心传递着一个严肃的讯息。

He was one of my most able pupils, but far too easily distracted by frivolities. 他曾是我最为得意的学生之一，但他太容易被玩乐分心。