单词	self-propulsion
释义	self-propulsion noun self-pro·​pul·​sion ˌself-prə-ˈpəl-shən  : propulsion by one's own power Word History First Known Use 1874, in the meaning defined above
随便看	red ribbon red rice red ring red ring disease red river hog Red River maple red robin red rock red rock cod red rock trout red rockfish red rod red roe red roman red roncador red rot red rover red rust red sable red sage red salamander red salmon red sandalwood red sanders red sanderswood

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