英语词汇“have something down pat”的翻译、意思、用法、释义-英汉汉英词典

单词	have something down pat
释义	have something down pat [口语]了解得很透彻，彻底了解；记得很清楚，记得一清二楚以上来源于：《21世纪大英汉词典》
随便看	relay bid relay board relay box relay bridging relay broadcast relay broadcasting relay cabinet relay cabinet, relay rack relay center relay channel relay characteristic relay circuit relay coil relay-coil resistance relay computer relay contact relay contact combination relay contact gauging relay contact network relay-contactor relay control relay controller relay control system relay control terminal unit relay core