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》

Are you a lark or an owl?

你是一只云雀还是一只猫头鹰？

youdao

They stole the car for a lark, but now they're in trouble.

他们偷车只是觉得好玩，可是现在麻烦了。

youdao

What started out as a lark quickly became the hottest mascot on the West Coast.

FORBES: America's Top Sports Mascots

Johansson designed these dungarees in 1997 on a lark, to give to his friends.

WSJ: How Acne Studios Became a Fashion Powerhouse

Everything changed in the spring of his junior year, when on a lark he took a class about clay.

WSJ: The Artist Next Door | Innovator of the Year 2012 Art