Esters
[医]酯类
🗣️ 情景例句
Philip, why don't you go
Philip 你何不去
The teacher was not at all happy with his students.
那位老师对他的学生毫不满意。
While we were having breakfast, our little boy, Tommy, found two small coins on the floor.
正当我们吃早饭时，我们的小男孩汤米在地上找到两枚小硬币。