单词	self-propelled
释义	self-propelled adjective self-pro·​pelled ˌself-prə-ˈpeld  1 : containing within itself the means for its own propulsion a self-propelled vehicle 2 : mounted on or fired from a moving vehicle a self-propelled gun Word History First Known Use 1812, in the meaning defined at sense 1 Kids Definition self-propelled adjective self-pro·​pelled ˌself-prə-ˈpeld : containing within itself the means for its own movement a self-propelled lawn mower
随便看	open the door open the floodgates open the way open to open to debate open to dispute open to negotiation open to question open to reason open to reinterpretation open to suggestions open tone open traverse open tunnel open turn open up open up into open valley open verdict open water open waters open-access open-air open-and-shut open-and-shut block

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