美式橄榄球（American football），或称美式足球，是橄榄

美式橄榄球（American football），或称美式足球，是橄榄球运动的一种，美国最流行的运动，为北美四大职业体育之首。
美式橄榄球起源自英式橄榄球，传入美国后规则改变，改为采取攻防线进行回合制争球、没有跑位限制，并且可以向前抛掷传球，这运动的目的是要把球推进到对手的端区得分，得分方法有多种，包括持球越过底线，抛球到在底线后的队友，或把直放在地上的球踢过两枝门柱中间射门。比赛时间完时得分较多的一队胜出。[1]美式橄榄球是一种对抗性很强的接触性体育运动，由于球赛中往往会与对方球员有强烈的身体冲撞，因此球员需穿戴头盔和护具出场。

結果 (中文) 3:

American football (football American), or American football, is one of the most popular sports in the United States, the United States for the first four professional sports.Since the origin of rugby football, came to the United States after the rule change, to take the line of scrimmage round, no movement restrictions, and can be thrown forward pass, the purpose of this exercise is to advance the ball to the opponent's end zone score, score a variety of ways, including the ball crossed the line, drop to the bottom line the team, or to direct the ball on the ground two branch post middle shot. A team which scored more points in the game. [1] football is a confrontational strong contact sports, the game will often have a strong body collision with the other players, so players should wear helmets and armor appearance.