[請益] 再怎麼曬黑都有極限
發現再怎麼去海邊曬太陽
黑的程度還是有個極限
我們黃種人曬一曬
也不會變黑人
是不是每個細胞的黑色素量是固定的
它有一個飽和值
達到飽和就不會再產生黑色素了呢
有人知道為什麼嗎
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