[intransitive] ( informalsub) substitute (for sb / sth)to do something or be used instead of someone or something代替；取代◆Can you find someone to substitute for you in the meeting?你能找个人代替你出席会议吗？
substitute (for sb / sth)something that is used or done in place of something else代替物；代用品◆Margarine is an inexpensive substitute for butter.人造黄油是黄油的廉价代用品。