Ppps
[医][=polyvalent pneumococcal polysaccharide]多价肺炎双球菌多糖
🗣️ 情景例句
Please, sit down. What can I do for you?
请坐下。我能为你们做什么呢？
May I ask you how old you are?
我能问你多大了吗？
Kate, I'm sorry about that argument.
凯特，那次争吵我很抱歉。