1. 迄今;到目前为止
    You use hitherto to indicate that something was true up until the time you are talking about, although it may no longer be the case.

hitherto的反义词

    e.g. The polytechnics have hitherto been at an unfair disadvantage in competing for pupils and money...
           到目前为止，理工专科学校在争取生源和资金方面一直处于劣势。
    e.g. Hitherto, the main emphasis has been on the need to resist aggression...
           迄今为止，一直重点强调的是要抵抗侵略。