火成岩是从熔融状态(特别是通过熔化岩浆)凝固而成的石头。
Igneous rock is rock formed by solidification from a molten state; especially from molten magma.
照片的上半部是火成岩，由地球深处涌出地面的岩浆形成。
The horizontal lines across the top half of the image are intrusions of igneous rock, where magma poked up to the surface from deep underground.
本文的目的是以与高位火成岩相关的成矿作用为例，简要介绍透岩浆流体成矿作用理论模型。
The author aimed at simply introducing the theoretical model in terms of mineralization related to the high-level igneous rocks.
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