相图主要研究处于平衡状态或准平衡状态下，物质的组分、物相和外界条件的关系。
The main study of the Phase Diagram is the relationships between the matter's components and its phases with the outside conditions.
相图主要研究处于平衡状态或准平衡状态下，物质的组分、物相和外界条件的关系。
The main study of the phase diagram is the relationships among the components, the phases of matter system and the outside conditions around the system in equilibria state or quasi - equilibria state.
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