背负运输车piggyback: adv.,adj. =pickaback. car: car2 adj. 〔苏格兰语〕 1.惯用左 ...intravenous piggyback: 借道静脉输液法piggyback acknowledgement: 捎带应答piggyback board: 级联式插件板下载手机词典可随时随地查词查翻译