资料来源 : pyDict

空虚地,无表情地

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

Vacantly \Va"cant*ly\, adv.
   In a vacant manner; inanely.

资料来源 : WordNet®

vacantly
     adv : in a vacant manner; "she was staring vacantly into the room"