pigmentation

n [U] colouring of the skin, hair, etc by pigment 色素沉著: The disease causes patches of pigmentation on the face. 这种疾病能引起面部色素斑沉著.

piffle, piffling, pig, pig iron, pig-iron, pigeon, pigeon-breasted, pigeon-hole, pigeon-toed, pigeonhole, piggery, piggish, piggishly, piggishness, piggy, pigheaded, pigheadedly, pigheadedness, piglet, pigment, pigmy, pigskin, pigsty, pigswill, pigtail, pike, pikestaff, pilaff, pilaster, Pilatus Porter, pilchard, pile, pile up, pile-driver, pile-up, piles, pilfer, pilferage, pilferer, pilgrim,