deadpan

面無表情的、不動聲色的

She told the joke with a completely deadpan expression.

她講那個笑話時表情完全不動聲色。

冷面的、冷調的多指幽默風格

His deadpan humor takes a while to get used to.

他那種冷面幽默要一陣子才習慣。

面無表情地、一本正經地

He delivered the punch line deadpan and waited.

他一本正經地說出笑點，然後就等著。

面無表情的臉、撲克臉

Her perfect deadpan made the whole room laugh.

她那張完美的撲克臉讓全場都笑了。

板著臉說、一本正經地說

"I never make mistakes," he deadpanned to the class.

「我從不出錯。」他板著臉對全班說。