Researchers are not sure why, but they suggested that the potential protective effects of the female hormone estrogen and the skin pigment melanin should be investigated as potential reasons.

研究人员还不能确定为何会出现这种情况，不过他们建议，应该把雌激素和皮肤黑色素的潜在保护作用作为可能的原因进行调查。

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This paper studied the effects of bagging during the period from young fruit formation to fruit coloration on the contents of pigment, sugar and endogenous hormone in Cara Cara orange flesh.

以红肉脐橙为试材，研究幼果期套袋至果实着色前拆袋对果肉中色素、糖及内源激素的影响。

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There was a time when people were afraid of hormone by eating animals, toxins by eating some plants, pigment by drinking some drinks.

一个时期以来人们谈“食”色变，吃动物怕激素，吃植物怕毒素，喝饮料怕色素。

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