这个小型实验项目是一个成功的概念验证，证明了我们的设计理念是可行的。

The small pilot project served as a successful ___proof-of-concept, demonstrating the viability of our design idea.

团队开发了一个概念验证来展示他们的创新想法是否可行。

The team developed a ___proof-of-concept to demonstrate if their innovative idea was feasible.