I'm experienced in IBM-PC and Great Wall computers.
我熟悉IBM-PC和长城电脑。
The napkin is dirty, Would you bring me a clean one, please?
这餐厅是脏的,请你拿个干净的给我。
Yes, I'm sorry about that. I think we just had a misunderstanding about the plan, but I was very disappointed not to be going out. So I got angry and started shouting at you.