大部分微量元素，包括锰和砷，通过自然过程中的岩石风化作用进入水体。
Most trace elements, including manganese and arsenic, get into the water through the natural process of rock weathering.
岩石的风化作用基本上是一种静力作用。
风化作用改变了岩石的矿物成分，岩石在风化过程中表现出来的阶段性，反映了岩石的不同风化程度。
Weathering action changes the mineral composition of rocks, and the periods of weathering process reflect weathering intensity.
岩石作为天然的建筑材料，通常承受着自然界的风化作用，因此，研究风化对岩石物理力学特性的影响是十分必要的。
As a kind of natural building material, rock usually is influenced by weathering. Therefore, it is necessary to research the influence of weathering on rock physical and mechanical characteristics.
岩石作为天然的建筑材料，通常承受着自然界的风化作用，因此，研究风化对岩石物理力学特性的影响是十分必要的。
As a kind of natural building material, rock usually is influenced by weathering. Therefore, it is necessary to research the influence of weathering on rock physical and mechanical characteristics.
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