Elementary formula
[计] 初级公式
🧩 词语组成解析
formula
['fɔ:mjulə]
n. 公式，准则;客套话;方案;婴儿食品;
🗣️ 情景例句
How many people are there in your family?
你家里有几口人？
There must be someone behind the door.
门后必然有人在。
I'll see you at six.
我六点钟见你。