subsurface explosion造句

例句与造句

1. The Carboniferous Black Vein coal seams in the area lay some 900 feet ( 275 metres ) below the surface and the mining activity associated with it was responsible for many tragic subsurface explosions, roof collapses and mining accidents.
2. It's difficult to find subsurface explosion in a sentence. 用subsurface explosion造句挺难的