kick-off
/ˈkɪkɒf/noun
1- the start or resumption of a football match, in which a player kicks the ball from the centre of the field（足球赛的）开球; 开赛：
three minutes before kick-off.
开赛前三分钟。
1.1
- informal a start of an event or activity〈非正式〉（事件或活动的）开始。