Mind your p's and q's. 要注意你任何细小的礼节. Don't misbehave. 不要乱来.
Don't be rude. 不要粗鲁. It's called professional courtesy. 这是同行间的礼貌.
Mind your manners. 当心你的举止. Allow me. 请让我来.
May I come in? 我可以进来吗?
Ladies first. 女士优先.
