美式橄榄球比赛在两只最多53人（NFL规则）的队伍间进行，双方分别派出

美式橄榄球比赛在两只最多53人（NFL规则）的队伍间进行，双方分别派出11名队员上场比赛，并可以随时更换场上部分或全部的球员。
拿到控球权的一方是进攻方，目标是尽可能将球向对方阵地推进，争取越过得分线进入对方端区得分。进攻的方法有两种，球员带球向前跑阵（冲球，Rushing）或将球向前抛传（传球，Passing）。防守方的目的则是尽可能阻止对方进攻得分，并迫使其丧失控球权。如果进攻一方得分成功或丧失控球权，双方队伍互换攻防，比赛就这样轮流攻防的进行下去，直到四节比赛时间结束。

結果 (中文) 3:

American football game between the two up to 53 people (NFL rules) between the teams, the two sides were sent 11 players to play, and can always replace the field on the part or all of the players.Get the ball is on the side of the offensive, is as far as possible to promote the ball the other positions, win over the score line into the other end. There are two kinds of attack methods, players run with the ball array (red ball, Rushing) or throwing the ball forward (pass, Passing). The defending team is to score as much as possible to stop attacking each other, forcing the loss of control ball. If the attack on the one side of the score or loss of control of the ball, the two sides exchange offensive and defensive teams, the game on the offensive and defensive play, until the end of the four quarter game.