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
When are Susan and Harry picking you up, Marilyn?
Susan和Harry什么时候来接你们， Marilyn
I'd like to change my reservation.
我想变更一下我的预订。
The need to produce ever-increasing quantities of cheap food leads to a different kind of pollution.
日益增长的对廉价食物的需求导致了另一种形式的污染。