资料来源 : pyDict

的确,当然地,适当地,及时地

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

Duly \Du"ly\, adv.
   In a due, fit, or becoming manner; as it (anything) ought to
   be; properly; regularly.

资料来源 : WordNet®

duly
     adv : at the proper time; "she was duly apprised of the raise"
           [syn: {punctually}]