P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
There's a big market today in wedding dresses.
结婚礼服在目前有很大的市场。
To make a public speech
发表演说
'At ten to eight.I bought a paper and waited for the train.'
“7点50分。我买了张报纸，等着车来。”