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substitution

英[sʌbstɪ'tjuːʃn] 美[,sʌbstə'tjʊʃən]
  • n. 代替;[数] 置换;代替物

英英释意


1. an event in which one thing is substituted for another;
"the replacement of lost blood by a transfusion of donor blood"
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"