the bitter end the bird of night the birch tree the biosphere 生物圈。the biodegradable sirolimus drug-eluting stent [医药科学]新型生物可降解性药物洗脱支架the binary-medium structure model [土木建筑工程]二元介质结构模型the billboard the biggest loser the bigamist the big-o the big take five [商业]大的五拍节奏the big sky the big six the big screen 电影；影坛。the big red one the big noise the big lie the big heist the big freeze [艺术学]冷冻极光枪the big fisherman