Faculative
a. 允许的, 任意的, 兼性的, 偶发的
🗣️ 情景例句
together in a more scheduled way.
能更定时在一起。
No,he doesn't have one.
不，他没有。
We've got some cheaper ones in the back room.
后面房间里有一些比较便宜的。