白蝕症

vitiligo

white / snowy / pure / bright / empty / blank / plain / clear / to make clear / in vain / gratuitous / free of charge / reactionary / anti-communist / funeral / to stare coldly / to write wrong character / to state / to explain / vernacular / spoken lines in opera

to nibble away at sth / to eat into / to erode

disease / illness

abdominal tumor / bowel obstruction / (fig.) sticking point