downline 英 ['daʊn'laɪn] 美 ['daʊn'laɪn] 基本解释 adv.沿下行(铁路)线 同首字母单词 d [diː] da [,di:'eɪ] daa dab [dæb] dabber ['dæbə] dabble ['dæb(ə)l] dabbler ['dæblə] dabchick ['dæbtʃɪk] dabster ['dæbstə] dac dacca dace [deɪs]