stone pit

The archaeologists discovered an ancient stone pit used for quarrying limestone.

考古学家发现了一个用于开采石灰岩的古老石坑。

Workers at the stone pit must wear helmets to protect against falling rocks.

在石坑工作的工人必须戴头盔以防落石。

After years of abandonment, the stone pit filled with rainwater and became a small lake.

废弃多年后，这个石坑积满雨水，变成了一个小湖。