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。

youdao

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。

youdao