alton.男最高音；女最低音；中音部adj.中音部的alto saxhorn中音萨克斯号altotrequent高频的Alto Ligonha阿尔特里哥纳Altolaquirre阿尔托拉基雷alto cumulusn.高积云alto relievon.高凸浮雕alto clariet中音竖笛altofrequentadj.高频的Altolaguirre阿尔托拉吉雷altofrequency高频率