Sometimes they are here on business (that is, having fun at public expense), sometimes they are on their own, sometimes for no reason at all, but they would show up at your doorstep all the same.

• 他们有时是出差(亦即借公费旅游)，有时是自费出来游玩，有时候是啥也不为，突然之间就在你家门口冒出来了