From an underground stream right under the school. -Go on.
在学校下方这个地下河里-继续。
动画英语
The island was shot through with holes burrowed by the water, a maze of criss-crossing underground streams.
岛上被水挖出的洞贯穿其中,这是一个纵横交错的地下小溪的迷宫。
啊,拓荒者!
Nevertheless, the underground stream was there, and it was because she had so much personality to put into her enterprises and succeeded in putting it into them so completely, that her affairs prospered better than those of her neighbors.
A subterranean river is a river that runs wholly or partly beneath the ground surface – one where the riverbed does not represent the surface of the Earth (rivers flowing in gorges are not classed as subterranean). It should also not be confused with an aquifer which may flow like a river but is contained within a permeable layer of rock or other unconsolidated materials.