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four-stroke

adjective
🔊/ˈfɔː strəʊk/
🔊/ˈfɔːr strəʊk/
 (specialist)
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  1. (of an engine or vehicle发动机或机动车) with a piston that makes four up and down movements in each power cycle 四冲程的compare two-strokeTopics Transport by car or lorryc2