Back in the mid-1800's, this was especially important as many buildings used gas lighting and tending to be quite gloomy.
早在19世纪中期，这一点就显得尤其重要，因为许多建筑物内都使用煤气照明，里面往往非常阴暗。
Gas lighting
原声例句
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Gas lighting
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Gas lighting is production of artificial light from combustion of a gaseous fuel, such as hydrogen, methane, carbon monoxide, propane, butane, acetylene, ethylene, or natural gas.
The light is produced either directly by the flame, generally by using special mixes of illuminating gas to increase brightness, or indirectly with other components such as the gas mantle or the limelight, with the gas primarily functioning as a heat source.
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