資料來源 : pyDict

潛望鏡,展望鏡

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Periscope \Per"i*scope\, n. [Pref. peri- + -scope.]
   A general or comprehensive view. [R.]

資料來源 : WordNet®

periscope
     n : an optical instrument that provides a view of an otherwise
         obstructed field