American football or American football derived from the British rugby, rugby is a sport.
美式足球或美式橄榄球源自英式橄榄球，是橄榄球运动的一种。
The method of scoring in American football is the same as in rugby.
美式足球的得分方法与橄榄球相同。
Rugby, which is also called American football, is a popular sport in America.
橄榄球，又称美式足球，在美国是一项很受欢迎的运动。
Rugby, which is also called American football, is a popular sport in America.
橄榄球，又称美式足球，在美国是一项很受欢迎的运动。
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