Partial sum
[计] 部分和数
🧩 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
Let's go.
我们走。
I will go with him if he asks me.
我会和他走，假如他要求我的话。
Excuse me.Where's the nearest post office, please?
请问。最近的邮局在哪里？