名词
中文翻译：气体火焰
同义词：
['gas flame', 'gaseous flame例句：1. The gas-air flame was visible from the observation deck.（从观景台上可以看到气体火焰。）']
例句：
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1. The gas-air flame was visible from the observation deck.
从观景台上可以看到气体火焰。
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2. The gas-air flame illuminated the night sky.
气体火焰照亮了夜空。
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3. The gas-air flame was used as a source of heat for cooking.
气体火焰被用作烹饪的热源。