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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	public ownership public park public policy public prosecutor public purse Public Record Office public relations public room public school public school boy public-schoolboyish public schooling public-schoolish public-schoolishness public-schooly public sector public servant public service public-service corporation public service vehicle public speaker public speaking public spending public spirit public-spirited

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。