单位元素

具有单位元素的非结合环和结合环的交换性

Commutativity of some non associative rings with 1 and some associative rings with 1

我们称O为加性单位元素。

We call O the additive identity .

XML的基本数据单位是元素。

XML 's basic unit of data is the element .

化学反应不能将元素分解成更小的单位。元素只含有一种原子。

An element cannot be broken down into simpler units by chemical reactions ; it contains only one kind of atom .

其次对结构元素进行改进和优化，定义单位结构元素，利用数学方法推导找到零方阵的单位结构元素；

Then the unit of structuring element is defined and the structuring element unit of zero matrices is deduced and found by mathematical method .

变质岩填图单位与放射性元素分布之间的关系

Relationship between mapping units of metamorphic rocks and the distributive characteristics of radioactive elements

语法单位和语法元素的层次阿尔泰语言构形成分的句法层次问题

Layers of tagmemes and taxemes The Syntactic Tiers of Altaic Inflectional Suffixes & An Approach of Generative Syntax

现代汉语离合词现象是指一些句法单位的构成元素之间结合得不够紧密，可以在中间插入某些其它成分进行离析，而这些单位在离析后基本意义并没有发生改变的语法现象。

Line words in modern Chinese refer to the syntactic units whose structure is so loose that some other components can be inserted between its original elements while the original meaning of the syntactic units mainly remain the same .

度量单位为相对于父元素的百分比。

Measurement is a percentage relative to the parent element .

由两个或两个以上（单位、成份、元素或术语）组成的。

Consisting of two ( units or components or elements or terms ) or based on two .