求翻译：　　比赛以开球开始。开球过程是，防守方的开球手将球放在本方30码线的球座上，然后将球踢向进攻方。进攻方的开球回攻手接住球后将尽量向前推进，直到被防守方阻截。进攻方然后从球被阻截处开始一轮进攻。是什么意思？

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competition began to kick-off. Kick-off process, the defending side kick-off-hand the ball to the side of the line 30 yards, and then will tee ball to an offensive side. The offensive side kick back after a ball player will try to move forward, until they were defending side interdiction. The attack

The competition kicks off starts.The kick-off process is, the defensive side opens the ballplayer to place the ball we 30 yards lines on the ball bearings, then kicks the ball to the attack side.After the attack side kick-off will attack the hand to meet the ball as far as possible to prompt forward

Competition begins with a kickoff. Kick off the process is that the defensive side kick off hand to the ball on the 30-yard line on the ball and kicked the ball to the attacking side. Attack after kick off back to the attacker catch will move forward as far as possible, until the defending party int

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