资料来源 : pyDict

代理,替换,交换

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

Substitution \Sub`sti*tu"tion\, n. [L. substitutio: cf. F.
   substitution.]
   1. The act of substituting or putting one person or thing in
      the place of another; as, the substitution of an agent,
      attorney, or representative to act for one in his absense;
      the substitution of bank notes for gold and silver as a
      circulating medium.

   2. The state of being substituted for another.

   3. The office or authority of one acting for another;
      delegated authority. [R.] --Shak.

   4. (Civil Law) The designation of a person in a will to take
      a devise or legacy, either on failure of a former devisee
      or legatee by incapacity or unwillingness to accept, or
      after him. --Burrill.

   5. (Theol.) The doctrine that Christ suffered vicariously,
      being substituted for the sinner, and that his sufferings
      were expiatory.

   6. (Chem.)The act or process of substituting an atom or
      radical for another atom or radical; metethesis; also, the
      state of being so substituted. See {Metathesis}.

资料来源 : WordNet®

substitution
     n 1: an event in which one thing is substituted for another; "the
          replacement of lost blood by a transfusion of donor
          blood" [syn: {permutation}, {transposition}, {replacement},
           {switch}]
     2: the act of putting one thing or person in the place of
        another: "he sent Smith in for Jones but the substitution
        came too late to help" [syn: {exchange}, {commutation}]