longnn龙眼longadj.长的；冗长的；久的；长音的adv.长期地；久地；用于名词后强调某事发生在某整段时间v.渴望n.长时间；长音节；囤积商品者longhole infusion深孔注水long fruit branch长花枝long coupling pin长联结销Longkou Coverment龙口市long-focus lens长焦距透镜Long-rang order长接触距Long March spirit长征精神Longdong district陇东老区long eccentricity长偏心率longrun mechanism长效机制