Wofatit
离子交换树脂
🗣️ 情景例句
So, you're an exchange student.
哦，你是一名交换学生。
This is our most recently developed product.
这是我们最近开发的产品。
Oh, yes, Mr. Chou. We've been looking forward to this.
啊，周先生，我们一直在等着您来。