即使氢气是由天然气生产出来的，汽车的碳排放量也比汽油混合型汽车低很多。
Even if the hydrogen is produced using natural gas, the emissions of the car are many times lower than those of a petrol-hybrid model.
利用气隙比磁导法建立了混合式步进电动机的磁网络模型，推导出谐波反电势的表达式。
The magnetic network model of hybrid step motor is established according to the air gap late permeance method, and the expression of the harmonic back EMF is deduced.
混合气的压缩量，由发动机的压缩比决定。
The amount that the mixture is compressed is determined by the compression ratio of the engine.
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