The boys didn't mean any harm—they just did it for a lark.

那些男孩并无恶意—他们只是闹着玩罢了。

《牛津词典》

She drew it only for a lark.

她只是画着玩的。

youdao

He said he only did it for a lark.

他说他只是闹着玩的。

youdao

Mismatched body clocks a night owl with a so-called lark, for example can be tough on a relationship, says Jeffry H.

WSJ: Who Sleeps Better at Night?

You can still enter your name for a chance to win a free LARK. Questions?

FORBES: Trade In Your Recalled Jawbone UP Product For A LARK

For Members of Congress, this is all a lark, just more song-and-dance razzmatazz to entice voters to buy them tickets back onto the congressional stage.

FORBES: Seven Questions To Ask About Any Congressional Debt-Limit Deal