Plug-in electric hybrids give off less exhaust than gas guzzlers. And when they're running on battery power, they generate no fumes at all.
插电式混合动力汽车比单纯汽油动力汽车的废气排放量更少，尤其是当他们使用电源运行时，完全不会产生废气。
As the piston moves up it is compressed, the spark plug ignites combustion, and exhaust exits through another hole in the cylinder.
当活塞上行压缩气缸中的混合气体，火花塞点燃气体燃烧，通过气缸上另一个孔排气。
The combustion chamber has a center plug pent-roof combustion chamber with cross-flow intake and exhaust layout.
燃烧室有一个横流进排气布局中心插件被压抑的屋顶燃烧室。
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