Tannometer
鞣液比重计
🗣️ 情景例句
What is it?
那是什么？
I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解，但是，这个条件对我们是必要的。
I see, I'll look into it for you.
哦！这件事我会查明的。