Faculative
a. 允许的, 任意的, 兼性的, 偶发的
🗣️ 情景例句
They're open until nine o'clock.
他们开到九点。
Sorry to bother you, but do you have change for a one?
对不起，麻烦你，你有1元钱的零钱吗？
First, I'd like to tell you a few things about this factory.
首先，我想告诉你们有关这家工厂的一些情况。