单词	posigrade
释义	posigrade adjective posi·​grade ˈpäzəˌgrād : relating to, using, or being an auxiliary rocket that imparts additional thrust to a spacecraft in the direction of motion Word History Etymology positive + -grade (as in retrograde) First Known Use 1961, in the meaning defined above
随便看	slathers slatier slatiest slatinesses slating slating nail slatings slatish slats slatted slatter slattered slattering slattern slatternlier slatternliest slatternliness slatternlinesses slatternly slatterns slatters slattery slatting slattings slaty

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