Pdk
[医][=primary dog kidney]原代狗肾（细胞）
🗣️ 情景例句
How can you do business with the americans? You'll need to improve your English first.
你怎么能与美国人做生意？你得先提高自己的英文水平。
Every cloud has a silver lining.
山穷水尽疑无路，柳暗花明又一村。
I can't decide!
我拿不准！