单词	pre-ignition
释义	pre-ignition /priːɪɡˈnɪʃ(ə)n / noun [mass noun] The premature combustion of the fuel-air mixture in an internal combustion engine.Early ignition or runaway pre-ignition causes higher combustion chamber temperatures that can wreck the engine.... High-octane fuel simply allows the higher pressures and temperatures in these high-output engines by preventing pre-ignition. To run an engine on unleaded fuel it may be necessary to retard the initial timing to prevent detonation and/or pre-ignition.
随便看	the Lakes the Lamb of God (also the Lamb) the land of Nod the land of the free the last minute the last (or final) straw the last straw the last word the laugh is on me (or you, him, etc.) the Law (the law of) diminishing returns the Law of Moses the law of the jungle the Left the length and breadth of the lesser evil (or the lesser of two evils) the Lido the lie (lay) of the land the life and soul of the party (the life of the party) the light of day the light of one's life the lights are on, but nobody's (or no one's)home the likes of the Line the line of least resistance

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