You have to mix oil into the gas in a two-stroke engine because the holes in the cylinder wall prevent the use of rings to seal the combustion chamber.

在二冲程发动机中你必须混和燃料和气体，因为气缸壁上的孔阻止使用活塞环密封燃烧室。

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The spark plug is installed in the combustion chamber of the gasoline engine and used to ignite the compressed combustible mixture in the cylinder.

火花塞安装于汽油发动机的燃烧室内，用于点燃气缸内被压缩的可燃混合气。

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A new kind of combustion system of conical spray nozzle applying in re-entrant chamber is presented in this Paper, and experimental studies are made in 110 model single cylinder experimental engine.

本文提出了一种令型喷油器和挤流口燃烧室组成的燃烧系统，并在110单缸试验机上进行了试验研究。

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It works by forcing fuel directly into the combustion chamber of each cylinder to mix air and gas simultaneously at the point of combustion, rather than mixing air and gas in a separate chamber like more conventional engines.

FORBES: Automotive Terms You Need To Know

The EPA pulled off the feat by sharply increasing the amount of oxygen-poor exhaust that is recirculated into the combustion chamber and increasing the pressure of the fuel being forced into the cylinder.

FORBES: EPA, Inc.