A game played by two teams of 11 players each on a rectangular, 100-yard-long field and 53.5-yard-wide with goal lines and goal posts at either end, the object being to gain possession of the ball and advance it in running or passing plays across the opponent's goal line or kick it through the air between the opponent's goal posts.

【美】美式足球运动；橄榄球运动。每一队十一名球员，球场的大小为一百码长，五十三点五码宽。得分的方式通常为(1)进攻到对方底线达阵得六分，(2)射门，球穿越门柱得三分，(3)加分踢球(extra point)：在达阵之后，球放在两码处射门，球穿越门柱，可多得一分；(4)两分转换(2-point conversion)，即在两码处再进攻一次，若再攻入达阵，则可再获得两分；(5)安全得分(safety)：进攻的球员若在自己的达阵区被擒抱，对方可得两分。

The inflated oval ball used in this game.

【美】美式橄榄球。

A game played by two teams of 11 players each on a rectangular field with net goals at either end in which each try to drive a ball into the opponent's goal by kicking, heading, or using any part of the body except the arms and hands. The goalie is the only player who may touch or move the ball with the arms or hands.

【英】足球运动。每一队十一名球员，其中的十名球员可用头顶、脚踢，或用身体其它部位，手或臂除外将球攻入对方球门。只有守门员可以用手接球。

The inflated round ball used in this game.

【英】足球。