Organización Nacional de Ciegos Españoles (ONCE) (Spanish pronunciation:[ˈonθe], National Organization of Spanish blind people) is a Spanish foundation founded on December 13, 1938, to raise funds to provide services for the blind and people with serious visual impairment.
英英词典
once adv.
on one occasion
once I ran into her
synonymous: one time, in one case
as soon as
once we are home, we can rest
at a previous time
she was a dancer once
synonymous: formerly, at one time, erstwhile, erst