资料来源 : pyDict

说明的,解释的

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

Expositive \Ex*pos"i*tive\, a.
   Serving to explain; expository. --Bp. Pearson.

资料来源 : WordNet®

expositive
     adj : serving to expound or set fourth; "clean expository writing"
           [syn: {expository}]