Faculative
a. 允许的, 任意的, 兼性的, 偶发的
🗣️ 情景例句
All right?
知道吗？
We are thinking of expanding into the Chinese market.
我们想把生意扩大到中国市场。
I had not laughed since I became deaf.
我耳聋后就从来没有笑过。