燃料的着火及稳定燃烧与燃烧环境是影响锅炉燃烧稳定性的最主要因素，对锅炉的安全经济运行有着重要影响。
The ignition and steady combustion of fuel and combustion condition are the key factors to the combustion stability of boiler, so they determine the security and economy of boiler.
经济制度及其运行轨迹并非孤立地存在，而是嵌入于复杂的社会关系、社会组织及文化环境之中。
The economic system and its movement trajectory do not exist in isolation, but inlay in very complicated social relationships, social organizations, and a cultural environment.
拓展希望和机遇取决于使美国经济保持运行和使美国的环境保持清洁的能源的稳定供应。
Extending hope and opportunity depends on a stable supply of energy that keeps America's economy running and America's environment clean.
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