An unknown quantity
未知量, 难预测的事
🧩 词语组成解析
an
[æn]
art. 一（在元音字母前代替不定代词a）;一任一某一;一个;
🗣️ 情景例句
Hello.
好。
When the accident happened, I was having dinner.
当意外事故发生时候，我在吃晚餐。
Are sure both of us have a brighter future.
我们相信双方都有一个光明的前景。