求翻译：1999年以来，B县城区居民集中供热一直采取高温蒸汽供热，供热面积165万平方米，这种供热方式，供热能耗大、输送范围小、安全隐患多、运行极不稳定，严重制约了B县供热事业的发展。因此，供暖改造势在必行。是什么意思？

Since 1999, the b county residents of central heating has been taking the high-temperature steam heating, heating area of ​​1.65 million square meters, this heating method, heating energy consumption, transmission range is small, more security risks run extremely unstable. seriously restricted the d

Since 1999, B County area residents have always been taken for a hot hot steam for heating and hot area 1.65 million square meters, and this heat, geothermal energy consumption, and transport small, unsafe conditions, running a very unstable, and seriously hampering B County for the development of t

Since 1999, the B county seat area inhabitant has concentrated heats adopts the high temperature steam to heat continuously, the heating area 1,650,000 square meters, this heating way, the heating energy consumption big, the transportation scope small, the security hidden danger many, the movement i

Since 1999, b central heating of city and County residents have been taking high-temperature steam heating, heating an area of 1.65 million square meters, this form of heating, heating energy consumption, transportation, security vulnerabilities much smaller scope, run highly unstable, b development

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