eight ball
eight-ball的词性：n.Games （名词）【游戏】
1. A black pool ball that bears the number eight and that may put a player at a disadvantage.8号黑球：一种弹子戏中有“8”字记号的黑球，可使游戏的人不利
2. In an unfavorable or uncomfortable position.处于困境：处于不利或不适的地位
