根据中国天然气组分变化的情况，研究了天然气组分变化时，燃料的低热值、理论空燃比和燃烧势等燃烧参数的变化；
The variations of lower heating value, theoretical air fuel ratio and combustion potential of natural gas fuel were investigated according to the variation of natural gas composition in China.
她向我平举左臂，摊开手掌，火炬状的眩光赫然出现在她掌心处，不住腾跳燃烧，始终不离开她掌心的势场。
She flat on her left arm to me, shrug torch-like glare out there in her palm, jump burning, never leave the potential field of her palm.
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