| 单词 | four-stroke engine | 
| 释义 | four-stroke engine The single cylinder, four-stroke engine pulls steadily and can easily tip you over the 70mph mark.  The Sun  Displacements of this four-stroke engine family ranged from 1.0-liter to 1.5-liter and have been produced from 1967 to the present.  Retrieved from Wikipedia CC BY-SA 3.0   It has a single-cylinder, air-cooled, four-stroke engine, displacing 124cc cuin.  Retrieved from Wikipedia CC BY-SA 3.0   The tandem twin layout has virtually no benefit for a four-stroke engine.  Retrieved from Wikipedia CC BY-SA 3.0   In terms of power per cm, a two-stroke engine produces comparable power to an equivalent four-stroke engine.  Retrieved from Wikipedia CC BY-SA 3.0    | 
	
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