把台球放在置球点上临时上场替换他人的不按排定顺序上场的为防止受伤在场上保护运动员the spot罚球点
Those who place billiards on the ball placement point and come on temporarily to replace others without following the scheduled order, to prevent injury, protect the athletes on the field at the spot penalty spot
以上为机器翻译结果，长、整句建议使用 人工翻译 。