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
Just slow.
只是太慢了。
I ought to tell him the whole story.
我应该告诉他整个事情的始末。
You see, I put some soil in the box, sow the seed carefully like this, and then cover it with more soil.
你瞧，我在盒子里放些泥土，像这样小心地把种子播下，然后再用多一点儿的土盖住种子。