资料来源 : pyDict

每百年地

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

Centennially \Cen*ten"ni*al*ly\, adv.
   Once in a hundred years.

资料来源 : WordNet®

centennially
     adv : every hundred years; once in a century; "the birthday of
           this city is being celebrated centennially"