Nonrestrictive
a. 非限制性的
🗣️ 情景例句
The work is coming along quite well.
工作进展得相当顺利。
Do you often study history on Saturday?
你常常在星期六学历史吗？
I bought some this morning. It's in the fridge.
我今天早晨买了一些。在冰箱里。