资料来源 : pyDict

推测上,假定上,大概

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

Presumably \Pre*sum"a*bly\, adv.
   In a presumable manner; by, or according to, presumption.

资料来源 : WordNet®

presumably
     adv : by reasonable assumption; "presumably, he missed the train"
           [syn: {presumptively}]