Stop being facetious; this is serious.

别乱开玩笑，这是个严肃的事。

《牛津词典》

I'm not being facetious.

我不是故意打岔。

youdao

He is so facetious that he turns everything into a joke.

他好开玩笑，把一切都变成戏谑。

youdao

He was so facetious that he turned everything into a joke.

他好开玩笑，把一切都变成了戏谑。

youdao

He was so facetious that he turned everything into a joke.

他好开玩笑，把一切都变成了戏谑。

youdao