燃料由火花塞点火。
柴油机因其马虎粗糙的无火花塞点火方法，而素有烟雾弥漫和刺鼻难闻的恶名。
DIESEL engines, with their rough-and-ready, spark-plug-free method of fuel ignition, have a reputation for being smoky and smelly.
在火花塞点火后，水分子在高温高压下产生大量的氧气，供油分子充分燃烧。
After the spark plug ignition, the water molecule can generate much oxygen in the high temperature and high pressure to supply the fuel combustion.
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