这是因为鲜艳的颜色是在许多食物中发现的天然颜色，所以能够提振人们的精神。
This is because bright colors are natural colors found in many foods, and, therefore, able to raise people's spirits.
由于天然颜色，随着时间产品外观可能有所改变。
Product appearance may change over time due to natural colors.
白癫风是一种皮肤病，其患者皮肤失去天然颜色，产生白色斑点。
Vitiligo is a skin disease causing the loss of pigmentation in which patients develop white spots in the skin.
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