紫心番薯色素（PPSP）为水溶性天然色素。

The pigment of purple sweet potato(PPSP)is water-soluble natural pigment.

youdao

紫心番薯色素（PPSP）为水溶性天然色素。

The pigment of purple sweet potato(PPSP)is water-soluble natural pigment.

youdao