Odontolite
[医] 牙垢, 牙积石
🗣️ 情景例句
Let's have a talk about it in advance.
我们事先商量一下。
So, you see...
所以啊，你该知道……
When it has been decided where we are going to drill, we put up at the surface an oil derrick.
当确定钻孔地点后，我们就在那里竖起一个井架。