Pdk
[医][=primary dog kidney]原代狗肾（细胞）
🗣️ 情景例句
One week after I have submitted my resignation paper.
在我提交辞职信一星期后吧！
I asked him to lend me a book , but he wouldn't.
我请他把书借给我，但是他不肯。
She became more and more beautiful.
她变得越来越漂亮了。