P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
Art is for enjoying, it shouldn't be wasted.
艺术是用业观赏的，不能糟踢它。
Yes, and I took many pictures.
是的，我还照了好多照片。
Is it your sister, Kate?
是你的妹妹，凯特？