科学分析表明，这些颜色是源自赭石和其他铁氧化物磨成的细粉。

Scientific analysis reveals that the colors were derived from ocher and other iron oxides ground into a fine powder.

youdao

科学分析表明，这些颜色是源自赭石和其他铁氧化物磨成的细粉。

Scientific analysis reveals that the colors were derived from ocher and other iron oxides ground into a fine powder.

youdao