水壶在炉子上沸腾，发出尖啸声。

The ___kettle is whistling on the stove.

露营时我们用大铁锅煮了一整只鸡。

We boiled a whole chicken in the outdoor ___kettle during the camping trip.

冰川融化后形成了许多小水坑，其中一些成为了天然的池塘。

After the glacier melted, many small ___kettles were formed, some becoming natural ponds.