Biju比朱Bin.[化]元素铋(bismuth)的符号bi-: pref.；表示“二；双”bimorph memory cell双态存储元件biped walking robot两足步行机器人biparietal diameter顶骨间径biendomorphism ring双自同态环bipedal progression两腿直立行走bipartite partition二分图划分biplane arrangement双向排列Bi-equicontinuous双等度连续bifactorial mapping双因子映射Bicaulus sagittatus具矢复尾线虫