玩台球和电脑对打时到最后只剩下黑8时要call shot

呼叫撞击制
Call shot rule-呼叫撞击制-选手出杆击球前必须指定球指定袋的规定(如14-1、8号球)

可以撞击任何目标球,不过选手在击球之前必须先指定目标球,并且指定球袋,把指定球击落指定的球袋才算得分,否则不予计分,这称为「呼叫撞击制」亦称指定击球,如果指定球未进袋而其他球进袋则不计分

WPA规则对call shot的定义：

1.6 Standard Call Shot
In games in which the shooter is required to call shots, the intended ball and pocket must be indicated for each shot if they are not obvious. Details of the shot, such as cushions struck or other balls contacted or pocketed are irrelevant. Only one ball may be called on each shot.
For a called shot to count, the referee must be satisfied that the intended shot was made, so if there is any chance of confusion, e.g. with bank, combination and similar shots, the shooter should indicate the ball and pocket. If the referee or opponent is unsure of the shot to be played, he may ask for a call.
In call shot games, the shooter may choose to call “safety” instead of a ball and pocket, and then play passes to the opponent at the end of the shot. Whether