此前的几年，已有1.3亿至1.55亿人口被飞涨的粮食和燃料价格推入赤贫行列，许多人尚未恢复过来。
This comes after soaring food and fuel prices of recent years, which pushed 130 to 155 million people into extreme poverty, many of whom have still not recovered.
在1859年第一口石油钻井出油之后的半个世纪以来，石油和天然气开始逐步取代煤而作为燃料。
Coal production climbed at an ever-accelerating pace. Half a century after the first oil well was drilled in 1859, oil and gas were beginning to displace coal as the fuel of choice.
燃料按照依次的点火顺序，以计量的方式被送入各个入油口。
Fuel is metered into each intake port in a sequential firing order.
对比不同扩口结构下的流场，发现安装一定结构的缩放扩口可以更好地促进燃料稳定、高效、清洁燃烧。
The research results show that the said burner can organize a rational aerodynamic field and have a comparatively good adaptability to load changes.
对比不同扩口结构下的流场，发现安装一定结构的缩放扩口可以更好地促进燃料稳定、高效、清洁燃烧。
The research results show that the said burner can organize a rational aerodynamic field and have a comparatively good adaptability to load changes.
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