Cavity preparation
[医] 洞制[备]法
🧩 词语组成解析
🗣️ 情景例句
Oh, how do you do, Xiao Fu. This is Mary.
哦，你好，小付。我是Mary。
In college I majored in math, What was your major?
大学时我主修数学，你主修什么呢？
As they had brought a spear gun with them, they had plenty to eat.
由于他们随身带了一支捕鱼枪，因此，吃饭不愁。