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"