资料来源 : pyDict

代理的,代用的,取代的

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

Substitutional \Sub`sti*tu"tion*al\, a.
   Of or pertaining to substitution; standing in the place of
   another; substituted. -- {Sub`sti*tu"tion*al*ly}, adv.