The corbelled stone work was an engineering feat.

拱形石砌工程是一项工程壮举。

Using small robots to travel underneath the temple through cracks in the stone work, researchers were amazed to find a large network of tunnels.

研究人员使用小型机器人在神庙下方穿行，穿过石制品的裂缝，他们惊奇地发现了一个巨大的隧道网络。