这个单词只有单数形式，没有复数形式。
This noun appears in the singular form, never in the plural form.
很多英文单词的单复数形式没差别，因此有时你会听到有人说为一篇文章做了“很多调查研究”，但这么说也很讨喜。
Many English words are the same in the singular as in the plural, so sometimes you will hear someone talk about the "researches" they did for a story, which is nonetheless endearing.
写出下列单词的复数形式。
给出下列单词的复数形式。
记住一些单词的特殊语法点，如有些名词是不可数的，有些名词只有复数形式的等等。
Note any grammatical characteristics of the words you are studying. For example, note when a verb is irregular and when a noun is uncountable or is only used in the plural.
文件拥有者的类名的复数形式，多个单词间以下划线连接。
The class name of the model that the attachment is part of, underscored and pluralised for your convenience.
练习单词的单复数形式。
与《英语写作中存在的语言错误如：主谓一致、时态处理、冠词用法、名词单复数形式、单词词性怎么区分和搭配?。
Strong language in southwest China use, at present and strong as their mother tongue in English writing mistakes and analysis of the research is not a lot.
与《英语写作中存在的语言错误如：主谓一致、时态处理、冠词用法、名词单复数形式、单词词性怎么区分和搭配?。
Strong language in southwest China use, at present and strong as their mother tongue in English writing mistakes and analysis of the research is not a lot.
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