类胡萝卜素是广泛存在于自然界中的一类色素，和人类健康密切相关。

Carotenoids are natural pigments, they are closely related to the people healthy.

youdao

类胡萝卜素是广泛存在于自然界中的一类色素，和人类健康密切相关。

Carotenoids are natural pigments, they are closely related to the people healthy.

youdao