资料来源 : pyDict

因此;由是

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Ergo \Er"go\, conj. or adv. [L.]
   Therefore; consequently; -- often used in a jocular way.
   --Shak.

资料来源 : WordNet®

ergo
     adv : (used as a sentenced connector) therefore or consequently