N a large basin-shaped crater at the top of a volcano, formed by the collapse or explosion of the cone 喷火山口 →see cirque
The eruptions were associated with the development of a number of giant craters (calderas).
随着火山爆发形成了多个大火山口（破火山口）。
There's a huge caldera in Kilauea's peak, 4027 meters diameter, more than 130 meters deep, which contains many little calderas.
基拉韦厄火山山顶上有一个巨大的火山口，直径4027米，深130余米，其中包含许多小火山口。
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