The distinction was a prominent feature of early theories describing the phases of matter.

这个区别是描述物质的早期阶段理论的突出特点。

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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.

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。

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At first, mapping both frameworks seems a trivial task — a matter of analyzing the phases, milestones, iterations, and artifacts.

首先，映射两个框架似乎是微不足道的事——就是分析阶段、里程碑、迭代和工件的问题。

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Both Sweden and Finland returned to fairly robust growth in a matter of a few years, on the back of six phases of recovery.

BBC: US ahead of UK on road to reducing debts