substitutions的翻译，读音
释义：
n. 代替；代用；替换（substitution的复数）
n an event in which one thing is substituted for another
n 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"
n an event in which one thing is substituted for another
n 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"