The word " person " is a countable noun. person这个词是个可数名词(CN)。
The word " weight " is called a countable noun in these examples. 在这些例子中,单词weight(秤砣)叫作可数名词(CN)。
Here," work of art " is a special countable noun. 这幅画的确是一件艺术作品。
Used before an uncountable noun ( abstract, material, proper ) to refer to a countable meaning of noun. 用在不可数名词(CN)(抽象、物质、专有)前,使该名词作为可数名词(CN)的用法。但当不可数名词(CN)前有表示数量的复数名词时,谓语动词用复数形式。