公出

tā gōng chū qù le měi guó

她公出去了美国。

She's been away on official business in the United States.

wǒ gōng chū shí zài běi jīng dān ge le liǎng tiān

我公出时，在北京耽搁了两天。

I stayed in Beijing for two days when I was on my official business.