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four-stroke engine

资料来源 : WordNet®

four-stroke engine
     n : an internal-combustion engine in which an explosive mixture
         is drawn into the cylinder on the first stroke and is
         compressed and ignited on the second stroke; work is done
         on the third stroke and the products of combustion are
         exhausted on the fourth stroke [syn: {four-stroke
         internal-combustion engine}]
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