Cephamycin
头霉素
🗣️ 情景例句
I can take the bus to work ...
我可以坐公共汽车上班……
I won't buy you story.
我不信你那一套。
Just a minute, please. I'm sorry, he's not here right now. Can I ask who's calling?
请稍等。对不起，他现在不在这儿。请问你是哪位？