substitute1/ˋsʌbstə͵tut; ˈsʌbstətjuːt or ˈsʌbstItjuːt/n [C] a person or thing that takes the place of another 替代者﹔代替品: a substitute teacher 代课教师a sugar substitute 代糖+for You can use oil as a substitute for butter. 可以用食油来代替黄油。
substitute2v 1 [T] to use something new or different instead of something else 用…代替: substitute sth for sth You can substitute olive oil for butter in the recipe. 这道菜可以用橄榄油代替黄油。2 [I] to do someone's job for a short time until they are able to do it again〔短时间〕替代: +for I substituted for John when he was sick. 约翰生病期间由我替他。 —substitution /͵sʌbstəˋtuʃən; ˌsʌbstəˈtjuːʃ$n or ˌsʌbstIˈtjuːʃ$n/n [C,U]