pontoon
n
any of a number of flat-bottomed boats or hollow metal structures joined together to support a temporary roadway over a river, an estuary, etc (作浮橋用的)平底船或金屬空筒; 躉船
[attrib 作定語]
a pontoon bridge 浮橋.
pontoon n (also twenty-one, vingt-et-un) (Brit) (US `blackjack)
(a) card-game in which players try to acquire cards with a face value totalling 21 二十一點(diǎn)牌戲.
(b) (in this game) score of 21 from two cards (二十一點(diǎn)牌戲中)兩張牌的點(diǎn)數(shù)之和為21點(diǎn).