P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
You didn't say the magic words.
你没有念魔语。
He who does not advance falls backward.
不进则退。
I fell in love with her at first sight.
我第一眼见到她就爱上了她。