Vector sum
[计] 向量和
🧩 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
They are expecting their first child.
他们在怀他们的第一个小孩。
There's no need!
多此一举！
Why don't you find a job and end this dependence upon your parents?
你为何不找个工作不再依靠你的父母呢？