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
It's getting late. Please excuse me, but I must leave right away.
时间不早了。对不起，我得赶紧走了。
When three know it, all know it.
三人知，天下晓。
It's a pen.
一支钢笔。