what mean of Kick-off?

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kick off有好几种解释 一）start a football match(by kicking the ball)(足球:开球) e.g. United kicked off and scored almost immediately(联队开球后旋即得分) 二)kick (sth) off=begin(a meeting e)开始 e.g. I'll ask Tessa to kick off (the discussion).我叫特萨开始(讨论) 三)kick sth off=踢掉某物 e.g. Kick off one's slippers(踢脱拖鞋) 但因为你的字是连在一起kick-off，就是指start of a football match（足球比赛的）开球
Kick-off 亦常用于一系列活动的开启典礼中。
Which me something to be started. For example: A project is to be started. "Kick-off" meeting is frequently to be used. It me a meeting for the preparation of starting a project or an event.
kick off 指球员把放在中圈中央点的球踢动，即足球赛开始。比喻用于其他情况，亦是指事情开始。 问字最好有全句列出，比较易理解。
1. 【足】开球 It started raining right after the kickoff of the soccer game. 足球赛一开球就开始下雨了。 2. 【口】(社交 ... 等的)开始 We had a project kickoff meeting this morning. 我们今天上午开了个项目开始的会议。