American football is derived from the English game of rugby, and is entirely different from ordinary football, that is, soccer or association football.
美国的橄榄球运动起源于英国的橄榄球赛，同一般的足球运动、即英式足球截然不同。
Though there is an association called the Ivy League, it refers to the above schools' participation in an American football athletic conference rather than to any academic alliance.
虽然有一个叫做“常春藤联盟”的组织，但那指的是上列名校所参加的一项美式足球会，而非任何学术上的结盟。
He draw a parallel between American football and association football.
他把英式足球和美式足球做了一个比较。
He draw a parallel between American football and association football.
他把英式足球和美式足球做了一个比较。
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