briefcase

n．公文包

bribery, bric-a-brac, brick, brickbat, bricklayer, bricklayer [C], bricklaying [U], bricklaying, brickwork, brickyard, bridal, bride, bridegroom, bridesmaid, bridge, bridgehead, bridging loan, bridle, bridle-path (also bridle-way), Brie, brief, briefing, briefly, briefs, brier (also briar), brig, brigade, brigadier, brigand, brigantine, bright, brighten, brightly, brightness, brill, brilliance, brilliant, brilliantine, brilliantly, brim, brim with,