There's literally formulas written down historically to tell me how to paint white skin -- what colors I should use for the underpainting, what colors I should use for the impasto highlights -- that doesn't really exist for dark skin.

历史上确实有公式告诉我如何画白皮肤— — 我应该用什么颜色做底色，我应该用什么颜色做厚涂高光— — 这对深色皮肤来说并不存在。