Elementary sum
[计] 基本合
🧩 词语组成解析
sum
[sʌm]
n. 总数;算术;金额;概略，要点;
vt.& vi. 总计;总结，概括;归纳;
🗣️ 情景例句
That must be Nat.
一定是Nat。
It's quite cold today.
今天天气相当冷。
It was getting very windy in the hills.
山上还刮起了大风。