He looked so wistful as he went away, hearing the frolic and evidently having none of his own.

他走的时候似乎闷闷不乐，若有所思；他听到你们在玩闹，而显然他自己没什么玩的。

youdao

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Tourists sunbathe and frolic in the ocean.

游客们晒日光浴，在海水中嬉戏。

《柯林斯英汉双解大词典》

In Miami, the Dolphins frolic in the Pro Player Stadium, named after an underwear manufacturer whose elastic has snapped.

ECONOMIST: Civic trophies

This meant the hottest part of the day - the hours after lunch - were spent sitting on the beach watching the foreign kids frolic in the surf.

BBC: An Italian's view on British winter clothes

Nobody could deny the weight of his research yet he skips lightly over anything he finds boring, the better to frolic in absurdity.

ECONOMIST: Renaissance advice books