substitution/ˌsʌbstɪˈtju:ʃn; ?@ -ˈtu:ʃn; ˌsʌbstə`tuʃən/ n1 [U] substituting or being substituted 代替; 替换; 代理; 取代.2 [C] act of substituting 代替; 替换; 代理; 取代 Two substitutions (ie of players) were made during the match. 在比赛中换了两次人.
牛津英汉双解词典