P. p. d.
[医] 精制蛋白衍化物(结核菌素)
🗣️ 情景例句
After my wife died,
我妻子去世后，
Too swift arrives as tardy as too slow.
欲速则不达。
and yet get hardly any benefit or relief.
而没有从中得到什么实益或宽慰。