18. The following sports are (sadly) not part of the Olympics anymore: solo synchronized swimming, tug of war, rope climbing, hot air ballooning, dueling pistol, tandem bicycle, swimming obstacle race, and plunge for distance.
18. 以下项目（令人遗憾）不再是奥运会的一部分：花样游泳、拔河、攀绳、热气球、手枪决斗、双人自行车、游泳障碍赛和跳水。