bladder

n 1 bag made of membrane in which urine collects in human and animal bodies 膀胱. 2 similar bag that can be inflated for various uses (eg the rubber lining of a football) （任何可充气的）囊状物（如足球内的橡皮球胆）.

blackberry, blackbird, blackboard, blackcurrant, blacken, blackened, blackguard, blackguardly, blackhead, blackjack, blacklead, blackleg, blacklist, blackmail, blackmailer, blackness, blackout, blackshirt, blacksmith, blackthorn, blade, blaeberry, blah, blame, blame for, blame...for, blame...on, blameless, blanch, blancmange, bland, blandishment, blandly, blandness, blank, blank cartridge, blank cheque, blank verse, blanket, blankly,