数和的英文：
scalar sum

参考例句：

Latin nouns have case, number and gender.
拉丁语名词有格，数和性。

The verb agrees with its subject in number and person.
动词的数和人称与其主语一致。

To inflect(a noun,a pronoun,or an adjective)for number and case.
字尾变化使(名词，代词或形容词)的数和格发生变化

In English the verb must agree with its subject both in number and person
英语动词必须与主语的数和人称都一致。

We shall present some of the basic properties of the vertex and edge chromatic numbers
我们将介绍顶点色数和边色数的一些基本性质。

The maximum wattage and rated voltage are shown on the heater data plate.
在热水器的规格面板上,标注着最大功率瓦数和额定电压。

The number of yams per 10 cm influences the length of the float along with the number of harnesses.
织物中每10厘米中的纱线根数和使用综框的数目影响着浮长线的长度。

scalar是什么意思：
n. 数量
a. 数量的,分等级的,梯状的

The divergence of a vector function is the scalar function
矢量函数的散度是一个标量函数。

Inertia scalars are defined in terms of quantities called inertia vectors
我们将用惯性矢量来定义惯性标量。

The criterion of equality of two quaternions is that their scalar parts shall be equal
两个四元数相等的准则是，它们的数量部分相等。

The B-module MB is said to be obtained from M by extension of scalars
我们说B-核MB是从M验纯量扩充而得到的。

Fixed a bug in WDDX deserialization that would sometimes corrupt the root element if it was a scalar one.
修正了WDDX反序列化时如果是标量可能破坏根元素的问题

sum是什么意思：
n. 总数，总和；算数；金额；要点
v. 合计；总结

There are spots in (or on) the sum
人孰无过

This is the sum of this book.
这就是这本书的要点。

A Lump Sum Rate of ...
费用合计…

The sum of a column of figures.
总额一列数字的总和

He paid an enormous sum.
他支付了一大笔款项。