Longuan.朗格瓦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-day crop长日照作物long beech fern长山毛榉Longxian region陇县地区long span cross大跨越Longchengpterus龙城翼龙long term aging长期时效long-run test长期试验longan in syrup糖水龙眼long persistent长余辉long wave limit长波范围