here·by /hɪrˈbaɪ, ˈhɪrˌ/
  (ad.)以此,特此
  Here·by adv.
  1. By means of this.
     And hereby we do know that we know him.   --1 John ii. 3.
  2. Close by; very near. [Obs.]
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  hereby
       adv : (formal) by means of this; "I hereby declare you man and
             wife" [syn: herewith]