... 字符状态显示 character mode display 字符子串名 character substring name 字符子集 character subset ...
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numeric character subset [计] 数字字符子集 ; 数字字符集
Alphabetic Character Subset 字符字符子集 ; [计] 字母字符子集
alphanumeric character subset 文数字元子集 ; [计] 字母数字字符子集
numerical character subset 数字符号子集
subset character 字元子集
Since the code page 1252 contains only a subset of all Unicode characters, those Unicode characters that have no equivalent in code page 1252 are replaced by a so-called replacement character.
因为编码页1252只包含所有unicode字符的一个子集，在编码页1252中没有对应编码的那些Unicode字符由一个所谓的替换字符来替代。
All other non-character entity types are ignored, and no validation is performed, even for declarations within the internal subset.
所有其他非字符实体类型都被忽略，而且不进行检验，即使对于内部子集中的声明。
Encoding XML documents can reduce their size, but it does not limit the document to a subset of Unicode — thanks to the magic of character entities.
对XML文档编码可以缩小文档的大小，但是并没有限制文档使用特定的unicode子集，这要感谢字符实体。
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