spangadv.恰好；突然地；完全地spann.时期；跨度；间距vt.延续；横跨；贯穿；遍及；弥补动词spin的过去式形式.span transposition bracket浮空交叉架Spanning eulerian Subgraph欧拉生成子图spandex core - spun yarn弹性包覆纱spaned complete plane graph生成完全平面图Spanwise-wall oscillation展向壁面振动spanning eulerian subgraphs欧拉生成子图span-domain authentication跨域认证spandrel-braced arch bridge空腹拱桥,桁架式拱桥span of visual discrimination视觉辨别范围Spanning Tree Port States STP端口的几种状态如下图