conical pit

例句：

1. 1. The rock formation is shaped like a conical pit with a narrow opening at the top.
   岩石形态像一个圆锥形的坑，顶部有一个狭窄的开口。
2. 2. The excavator was digging a conical pit to collect water from the underground river.
   挖掘机正在挖掘一个圆锥形的坑来收集地下河流的水。
3. 3.The mine manager had to repair a conical pit that collapsed during an earthquake.
   矿场经理不得不修复一个在地震中坍塌的圆锥形坑。