P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
You don't know what the surprise is yet?
你们还不知道这个惊喜是什么？
Would you please have these clothes washed for me?
可以请你为我把这些衣服洗了？
We have a problem.
出问题了。