halfbatn.半砖halfn.一半；下半场；半学年adj.一半的；不完全的adv.一半地；不完全地half-tone plate半色调板half portal crane单脚高架起重机half wave antenna半波天线half-wave layer[计] 半波层halfwidth of line谱线半宽度half-chromosome半染色体half-wave plate半波片,半波偏振片half-pace stair转身楼梯half tone picture半色调图half-word block半字组