He intended it as a joke.

他只想开个玩笑。

《牛津词典》

Keep your shirt on! It was only a joke.

别生气！开个玩笑而已。

《牛津词典》

She told a joke to lighten the atmosphere.

她讲了个笑话以缓和气氛。

《牛津词典》

But it was not a joke. NASA found seven normal, everyday supermen in a group of five hundred candidates.

VOA: special.2009.06.10

It reminds me of a joke about the statistician who drowned in a pool with an average height of 10 inches.

这让我想起一个统计学笑话,在一个平均水深为10英寸的游泳池里，谁会被淹死。

哈佛公开课 - 幸福课课程节选

And somebody as a joke once asked her, "How do you feel living in this village after all these years?"

有个人开玩笑问她,"你在我们村住这么多年觉得怎么样"

耶鲁公开课 - 1871年后的法国课程节选

"Sometimes, as a joke, people put in that I'm going to Mars, " he says.

FORBES: The Answer Man

Even Robbie Williams got into the act with a version of I Started A Joke.

BBC: The Bee Gees - five decades of hits together

Ms. DICKINSON: Oh absolutely, and you know, we even made a joke of it.

NPR: Ask Amy: Responding to the Thin Envelope