BAF(=B cell activating factor) B细胞激活因子BAabbr.(=bachelor of arts) 文学士abbr.(=batting average) 击球率abbr.(=Buenos Aires) 布宜诺斯艾利斯abbr.[国家域名]波黑（=Bosnia and Herzegovina）Baven巴文Baehrn.贝尔baffyn.四号木杆Bakki鲍基Bajec巴热克Baura包拉Baijin.白暨豚(拉河豚科)Baibi白疕Baums鲍姆斯Baurs鲍尔斯