Paint it in red.

把它涂成红色。

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It was known that ochre-rock with red or yellow pigments-was used for paint even that far back in history. But there was scant evidence for how it was prepared and handled.

众所周知，拥有红色或黄色色素的赭石岩一直被广泛运用于绘画中，但却少有证据显示它是如何制作并运用的。

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But then I happened to read that lead in paint makes colors (particularly yellow and red) brighter and last longer; because lead costs less than alternates, cheaper toys are more likely to contain it.

可后来我偶然学到了一点知识：涂料中所含的铅有让色彩更艳丽、使油漆更耐用的作用，特别是红色及黄色涂料；而由于含铅涂料要比其他代用涂料便宜，因此，便宜的玩具含铅的可能性更高。

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