作者:文/会员上传 来源:网络收集 时间:2024-01-15 07:55:00 阅读:481
A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time.
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