piggyn.小猪adj.贪心的
piggyback distribution分段运销
piggy-back promotion附加赠品
piggyback traffic load背运输
piggyback trailer train背负式拖车列车
piggy-back legislation一揽子法案
piggyback twistor memory复合磁扭线存储器
piggyback characteristic背驮式特征
piggyback acknowledgment背页式应答
piggy-in-the-middlen.一种小孩玩的传球游戏
piggyback acknowledgement捎带应答