The amount of carbon monoxide that an engine gives off can be reduced by special devices designed to make the engine burn the fuel more efficiently.

使发动机更有效地燃烧燃料而设计的特殊装置可以降低发动机一氧化碳的排放量。

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The amount of carbon monoxide that an engine gives off can be reduced by special devices designed to make the engine burn the fuel more efficiently.

使发动机更有效地燃烧燃料而设计的特殊装置可以降低发动机一氧化碳的排放量。

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