Pdk
[医][=primary dog kidney]原代狗肾（细胞）
🗣️ 情景例句
I was late because I had a flat tire.
我来晚了，因为我的车坏了。
Six feet of earth makes all men equal.
在墓穴中人人都平等。
There are eighteen floors in the building, and he lives on the fifteenth floor.
这幢大楼有18层。他住在第15层。