keep your nose out of something
to try not to become involved in things that do not concern you 避免插手(他人的事);盡力不卷入(或介入)

Keep your nose out of my business affairs, will you? It's nothing to do with you.

別管我業務上的事行嗎?這跟你沒關系.

poke/stick your nose into something informal
to try to become involved in something that does not concern you 多管閑事;插手(與己無關的事) ,探聽(和自己無關的事)

she's always sticking her nose into other people's affairs. it's really annoying.

她總是多管閑事,真煩人.

What happens in this department does not concern him. Why does he have to poke his nose into everything all the time?

這個部門發生的事情與他無關.他干嘛總要多管閑事.