They set a foam block in front of ANYmal, which appeared as a solid surface on its terrain map.

他们在 ANYmal 前面设置了一个泡沫块，在其地形图上显示为固体表面。

These contain chemicals that, when mixed, expand into a dense, hard foam, blocking off the tunnel and buying time for a proper demolition with explosives later on.

这些化学物质混合后会膨胀成致密的硬质泡沫，堵塞隧道，为以后用炸药进行适当的拆除赢得时间。