P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
Bye.
再见。
When you called me, I was eating dinner.
当你打电话给了我时，我正在吃晚饭。
As the floods had put the telephone out of order, we could not find out how they were managing.
由于洪水造成了电话中断，我们无法了解他们情况。