Pdk
[医][=primary dog kidney]原代狗肾（细胞）
🗣️ 情景例句
I like to study in the library because it's so quiet.
我喜欢在图书馆学习因为那儿很安静。
I know he will be able to find way here.
我知道他会找到这里的路。
I arrived in London at last.
我终于到了伦敦。