【TED-Ed】肤色的科学| The science of skin color

[视频作者] TED双语视频笔记

[视频时长] 27:39

[视频类型] 校园学习

When ultraviolet sunlight hits our skin, it affects each of us differently. Depending on skin color, it'll take only minutes of exposure to turn one person beetroot-pink, while another requires hours to experience the slightest change. What's to account f