The researchers found that a change in the oxidation state of the element chromium (from chromium 6 to chromium 3) was linked to the darkening of chrome yellow paint.

研究人员发现，铬元素的氧化物由六价铬转变为三价铬，这与画作中的铬黄色日趋变暗有关。

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The effect of the experimental parameters on the interfacial bonding strength was investigated, as well as the influences of the anodic oxidation state on the titanium substrate surface appearance.

研究了试验参数对涂层界面结合强度的影响以及阳极氧化状态参数对钛基体表面形貌的影响；

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These metabolic changes were explained by the reduction of REDOX state which follows ethanol oxidation.

随乙醇氧化而发生的氧化还原状态的减少解释了这种代谢变化。

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The grey stands in contrast to the weathered red outer-coating of the Sheepbed unit, and the darker colour hints at a different oxidation state for iron (Fe) minerals that might be inside the rock.

BBC: Nasa's Curiosity Mars rover to ingest drill sample soon