ground base

例句：

1. 1. The ground base of the building is made of reinforced concrete.
   这座建筑的地基是用钢筋混凝土建造的。
2. 2.The research team needs a solid ground base to support their findings.
   研究团队需要一个坚实的基础来支持他们的发现。
3. 3. The company's ground base in this region has been expanding rapidly.
   该公司在这个地区的基地正在迅速扩张。