indoor proving ground

例句：

1. 1.This is the indoor proving ground where we conduct our experiments.
   这是我们进行实验的室内试验场地。
2. 2. The company uses this indoor proving ground to test its new products.
   该公司使用这个室内试验场地来测试其新产品。
3. 3. The engineers are working on an indoor proving ground for a new project.
   工程师们正在为一个新项目工作，这是一个室内试验场地。