“变白”用英语怎么说？

不停搅动猪肉，直到它全部变白为止。Stir the pork about until it turns white all the way through.她的手握得越来越紧，指节都变白了。Her knuckles whiten as she clenches her hands harder.头发变白并不一定等于变老了。Going grey is not necessarily synonymous with growing old....