增白劑

whitener / whitening agent

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 increase / to expand / to add

(bound form) to increase; to augment; to add to

dose (medicine)