shallow underground space的用法和樣例：
例句
- An aquifer is a layer of underground rock or sand whichstores and carries water.
含水層是保存和攜帶著水的一層地下的水或沙。 - A shallow subsurface nuclear explosion produces a large crater, obliterating facilities within its radius and any just beyond it where strong stresses rupture the earth.
淺層地下核爆會造成龐大的彈坑，炸毀半徑內所有的基地，強大的應力還會擊碎土壤，一併毀去彈坑附近的基地。
