hith·er·to /-ˌtu, ˌhɪðɚ/
  (ad.)迄今,至今
  Hith·er·to adv.
  1. To this place; to a prescribed limit.
     Hitherto shalt thou come, but no further.   --Job xxxviii. 11.
  2. Up to this time; as yet; until now.
     The Lord hath blessed me hitherto.   --Josh. xvii. 14.
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  hitherto
       adv : used in negative statement to describe a situation that has
             existed up to this point or up to the present time; "So
             far he hasn't called"; "the sun isn't up yet" [syn: so
             far, thus far, up to now, heretofore, as yet,
             yet, til now, until now]