单数名词是指一个人，一只动物，一件物品或一个地方。
另外，这些集体名词还可以用于用于单数意义把集体视为一个整体，用于复数意义指构成构成集体的一个个成员。
There is also a kind of collective noun which can be used either in the singular or in the plural sense. eg: team, a team, three teams.
在没有冠词的情况下，如果名词形式（指复数和单数）使用错误，有时可导致句子意思不清楚。
In the absence of an article, it can sometimes be unclear if the wrong sense (plural vs singular) has been used.
指包含两个单位与一个单位单数及多个单位复数相对的的语法数字范畴。
The unit crime is one category which is opposite to the crime of natural person.
指包含两个单位与一个单位单数及多个单位复数相对的的语法数字范畴。
The unit crime is one category which is opposite to the crime of natural person.
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