mass noun
1- Brit. the card game blackjack or vingt-et-un〈英〉二十一点扑克游戏。
1.1
- count noun a hand of two cards totalling 21 in this game一手积分二十一点的两张牌。
词源
early 20th cent.: probably an alteration of vingt-et-un 'twenty-one'.
1
- a flat-bottomed boat or hollow metal cylinder used with others to support a temporary bridge or floating landing stage浮舟。
1.1
- a bridge or landing stage supported by pontoons浮桥。
1.2
- a large flat-bottomed barge or lighter equipped with cranes and tackle for careening ships and salvage work趸船, 驳船。
1.3
- either of two floats fitted to an aircraft to enable it to land on water（飞机在水面降落用的）充气浮筒。
词源
late 17th cent.: from French ponton, from Latin ponto, ponton-, from pons, pont- 'bridge'.