A mark, usually a dash (?), indicating the omission of a word or of a letter or letters.
省略符号一标记，通常为破折号(—)，指一个单词或字母的省略。
If you intend to omit the argument, use successive commas in the argument list to mark its omission.
若要省略引数，请在引数清单中使用连续的逗号，来标记其省略。
Caret: Proofreaders' insertion mark, indicating where the omission occurred and the insertion required.
增字符号：校对遇所用的符号，用来指出漏字所在和所需的增字。
Caret: Proofreaders' insertion mark, indicating where the omission occurred and the insertion required.
增字符号：校对遇所用的符号，用来指出漏字所在和所需的增字。
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