The paper also introduces how to adjust the carburetor to get an ideal air-fuel ratio.

同时介绍了如何调整化油器以期获得理想的空燃比。

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The regulator holds a constant air-fuel ratio from cold start-up through hot air operation.

调节阀能够保证从冷启动到预热空气一直保持恒定的空气-燃料比例。

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By optimizing BF operation, fuel ratio and operational energy consumption were constantly lowered.

通过优化高炉操作参数，燃料比和工序能耗不断降低。

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It is significant, then, that Shell relies on gas for 48% of its fossil fuel production by energy value, while the corresponding ratio at other giant oil companies is between 37% and 41%.

FORBES: Magazine Article

It is significant, then, that Shell relies on gas for 45% of its fossil fuel production by energy value, while the corresponding ratio at other giant oil companies is between 37% and 41%.

FORBES: Shell Shocked

But until recently they have suffered from a low power-to-weight ratio, unlike the other sort of room-temperature fuel cell, the temperamental and costly proton-exchange-membrane device, which several firms hope soon to use in motor cars.

ECONOMIST: Clean living in Iceland