Noun:

1. a long swivel cannon formerly used by the navy

Longva隆格瓦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 septal lines长间隔线long white osprey长白鹭鸶毛long displacement大位移long span culvert大跨度涵管long and thin rod细长杆long lnmlnescence长余辉发光Long Island Sound长岛海峡(大西洋一海湾)long - life LED长寿LEDlong-run supply长期供应long range cruise远程巡航