因为它是JSON标准的一部分
http://json.org/
烧焦 any-Unicode-character- except-"-or-\-or- control-character \" \\ \/ <---- see here? \b \f \n \r \t \u four-hex-digits
烧焦
any-Unicode-character- except-"-or-\-or- control-character \" \\ \/ <---- see here? \b \f \n \r \t \u four-hex-digits