bxdboxed 装箱的bn.字母B；第二；B调；乙等；像字母B的东西B not more than至多b rs complement补码B-coefficient受激发射系数B. championii九龙藤B group Vitamin维生素BB. xylophilus松材线虫B. urceolaris壶状臂尾轮虫B. megaterium磷细菌Bjerrum rs sign布耶鲁姆氏征B.F.Skinner斯金纳