起始计时器显示到零的倒计时（从起始算起）,在还有10秒时发出可听见的电子警告声,从剩下5 秒起每秒响一次, 零秒后5 秒又响一次. 比赛着必须在零秒后5 秒（正计时5 秒）前起跑（开始）.
英语翻译The start timer displays the seconds counting down to ze
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