Methargen
[化] 双萘磺酸银
🗣️ 情景例句
John is tied up at the present time.
John现在有事。
Would he have seen you if you hadn't waved to him?
如果你没向他招手他会看见你吗？
He speaks little Chinese, so it's difficult to communicate with him.
他只能讲一点汉语，所以和他交流很难。