求翻译：首先通过了解超市的火灾特点、火灾危险性等级，确定出超市的耐火等级、保护对象等级，由此可以对超市进行防火分区、报警区域和探测区域的划分；是什么意思？

First by understanding the supermarket fire characteristics, fire risk rating to determine the fire resistance rating of the supermarket, the object of protection levels, which can fire district, supermarket division of the alarm region and detection region;

First of all, through understanding of fire characteristics, fire danger rating to determine if the surplus city fire rating, object of protection level, it can be a fire in a city district, alarm and detection region;

First through the understanding supermarket fire characteristic, the fire hazardous rank, determined supermarket fireproof rank, protection object rank, from this may carry on the fire protection district to the supermarket, report to the police the region and the search coverage division;

First learn about the supermarket fire characteristics and fire danger level, determine the fire resistance rating of a supermarket, protection level, which can fire the supermarket Division, Division of warning and detection zones;

正在翻译，请等待...