ball

n.球，球状物；(正规的)大型舞会

balalaika, balance, balance of payments, balance of power, balance of trade, balance sheet, balanced, balcony, bald, bald eagle, balderdash, balding, baldly, baldness, bale, baleful, balefully, balk, balk (also baulk), balky, ball game, ball-bearing, ball-point, ball-point pen, ballad, ballade, ballast, ballboy, ballgirl, ballcock, ballerina, ballet, ballet-dancer, ballistic missile, ballistics, ballocks, ballocks (also bollocks), balloon, balloon-borne, ballooning, balloonist,