求翻译：开球 比赛开始或得分后，按规则踢出的第一个球。英式橄榄球开球规定为：每半场开始，由开球队员在中线中点处作定踢；一方得分后，由另一方在中线中点处或在该点后方作落踢。开球方的队员必须站在球的后方，对方队员必须站在本方半场的10米线后，所踢出的球要越过对方的10米线。美式橄榄球开球规定为：每节开始或得分后，由开球方在场内本方32米中点上开球。可采用定踢或落踢。同队队员只能站在球的后方，对方队员必须站在离球3.05米远处，所踢出的球必须超过3.05米距离。是什么意思？

Kick off the start of the game or after scores, play by the rules of the first ball. Rugby kick off provisions: each half starting from bullier midpoint on the Middle Department for kicking; side after scoring, midpoint on the Middle Department or by another kick back for fall at that point them. Ki

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Kick off the start of the game or after scores, play by the rules of the first ball. Rugby kick off provisions: each half starting from bullier midpoint on the Middle Department for kicking; side after scoring, midpoint on the Middle Department or by another kick back for fall at that point them. Ki