group of spherical tanks

例句：

1. 1.The group of spherical tanks was deployed to the battlefield.
   这个球形坦克组被部署到了战场。
2. 2. The group of spherical tanks was responsible for protecting the border.
   这个球形坦克组负责保护边界。
3. 3.The group of spherical tanks was a symbol of national pride.
   这个球形坦克组是国家自豪的象征。