Longji龙脊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long-and-short pile长短桩long-range prepayment远程预付费long pulse power supply长脉冲电源long integer arithmetic大数运算long wave approximation长波近似Longitarsus binuwulatus双斑长跗跳甲long duration satellite长期运转卫星long persistence screen长余辉荧光屏long level relationship长期关系long frequent item sets长频繁项目集