资料来源 : pyDict

岗楼

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

Watchtower \Watch"tow`er\, n.
   A tower in which a sentinel is placed to watch for enemies,
   the approach of danger, or the like.

资料来源 : WordNet®

watchtower
     n : an observation tower for a lookout to watch over prisoners
         or watch for fires or enemies