The only thing that's clear is that whoever built this underground structure put an immense amount of time and care into its construction.

唯一清楚的是，建造这座地下建筑的人投入了大量的时间和精力。

This is a farm that we installed in central Beijing in an underutilized underground parking structure to grow vegetables for the nearby hotels.

这是我们在北京市中心一个未充分利用的地下停车场建造的农场，为附近的酒店种植蔬菜。