zài / zhèng / shì / chǎng / hé / kāi / zhè / zhǒng / wán / xiào / wèi / miǎn / yǒu / diǎn / méi / fēn / cùn

在正式场合开这种玩笑，未免有点没分寸。

Making this kind of joke in a formal setting is rather inappropriate.