Jack and Olivia, who grew up as neighbors in D.C., rode their tandem bicycle around the National Mall to celebrate.

在哥伦比亚特区长大的邻居杰克和奥利维亚骑着他们的双人自行车绕着国家广场庆祝。

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。