Pdk
[医][=primary dog kidney]原代狗肾（细胞）
🗣️ 情景例句
She majored in math and physics at university.
她在大学里主修数学和物理。
Please don't let the dog come in the house.
请别让狗进到屋子里。
He goes home early everyday for fear that his wife would be angry.
他每天很早就回家，免得老婆生气。