P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
My last name is Chen. C-H-E-N.
我姓陈，C-H-E-N。
I've got a slight pain in my knee.
我的膝盖有点痛。
Where he made mistakes, he admitted these willingly.
无论在哪里犯了错误，他都乐于承认。