Levair
磷酸铝、钾、钠盐
🗣️ 情景例句
How much do stamps cost?
邮票多少钱？
Oh, I'm very sorry, sir.
噢，我实在抱歉。
The workmen told him to do as he pleased and the policeman telephoned for help.
工人说，悉听尊便。警察去打电话叫人。