资料来源 : pyDict

在夜间;每夜

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

Nocturnally \Noc*tur"nal*ly\, adv.
   By night; nightly.

资料来源 : WordNet®

nocturnally
     adv : at night; "nocturnally active bird"