怀疑者说,迄今发现的大多数化合物来自火山堆积物。
But most of the compounds found so far, say the doubters, come from volcanic deposits.
火山机构由3个基本要素组成,即火山堆积高地、围斜构造和火山口,在地震剖面和水平切片上反射特征明显。
The accumulation of deep gas is controlled by the volcanic apparatus, which consists of 3 elements: volcanic plateau, pericline and crater, all having clear seismic reflective characteristics.
熔岩堆积,变硬,于是火山就形成了。
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