That red is uranium oxide.

那红的是二氧化铀。

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Hematite is an iron oxide that is deep red in color.

赤铁矿是一种具有深红颜色的氧化铁。

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Corrosion on iron. Red oxide deposits on the surface of the metal.

铁的腐蚀。红色氧化物沉积在金属表面。

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Occasionally red lead is added to the lead oxide.

有时将铅丹加到铅粉中。

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Occasionally red lead is added to the lead oxide.

有时将铅丹加到铅粉中。

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