在钻孔技术发达的今天，打通地下隧道已经不会伤及地表了。

Drilling technology has improved, allowing tunnels to be dug without breaking the surface.

youdao

在钻孔技术发达的今天，打通地下隧道已经不会伤及地表了。

Drilling technology has improved, allowing tunnels to be dug without breaking the surface.

youdao