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
Yes. And I'm not trying to take her place.
是的 ，我不想取代她。
I'm hoping to spend a few days in the mountains.
我正在希望到在山上过一些天。
Oh dear! It's very warm in this clasroom, isn't?
天哪，这屋里真暖和，不是吗？