blabbr.桶（=barrel）abbr.灾祸（=bale）abbr.黑（=black）abbr.蓝（=blue）abbr.块（=block）BL.abbr.文学学士（=bachelor of letters）abbr.提货单（bill of lading）BLCUabbr.北京语言大学（=Beijing Language and Culture University ）