Updated app日志查询 (markdown)

@@ -77,8 +77,8 @@
                 room_teacher: "1586759"
                 room_teacher: "1586759"
               },
               },
               event: "online_course_heartbeat",
               event: "online_course_heartbeat",
-              appTime: 1470645014751,
-              sysTime: 1470645017040
+              appTime: 1470645014751,    --app端记录的日志发生时间
+              sysTime: 1470645017040     --系统收到日志的时间
             }
             }
           ],
           ],
           last: false,
           last: false,