The primary uses of commas are to mark pauses, indicate the correct parsing, form lists, and indicate that a phrase is a parenthetical remark括号里面的表达 (that is, a comment) rather than a qualifier.
The primary uses of commas are to mark pauses, indicate the correct parsing, form lists, and indicate that a phrase is a parenthetical remark括号里面的表达 (that is, a comment) rather than a qualifier.