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 firm皮包公司

1. Long afeerglow phosphorescent materials have become a new kind of energy storing materials because of their excellent luminescent properties.
   摘要长余辉发光材料因其具有特殊的储能发光性能，是一类绿色环保型材料。