这些字符集代表了某种语言的字母或符号到数字的映射。
These character sets represent mappings of a language letter or symbol to a number.
这是因为在他们的语言中，每个符号或字母只代表一种声音。
This was because each sign, or letter, represented only one sound in their language.
名称只能以英文字母开始，不能是数字或符号。
Names must begin with an alphabetic character, not a number or symbol.
符号，数字：代表某物的书写或印刷符号，而不是字母，尤其数字。
A written or printed symbol representing something other than a letter, especially a number.
符号，数字代表某物的书写或印刷符号，而不是字母，尤其数字。
A written or printed symbol representing something other than a letter, especially a number.
字母、数字、标点符号或其他符号。
管型：这可能是一个，两个或三个字母，数字或符号。
TUBE TYPE: This may be one, two, or three alphanumerics or symbols.
管型：这可能是一个，两个或三个字母，数字或符号。
TUBE TYPE: This may be one, two, or three alphanumerics or symbols.
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