Definition
To take the place of or act as a replacement for another person or thing, typically performing the same role or function.
代替
In case of emergency, the young doctor will substitute for the senior physician.
在緊急情況下，年輕的醫生將代替資深醫生。
We are looking for a more environmentally friendly material to substitute for existing plastic packaging.
我們正在尋找一種更環保的材料來替代現有的塑料包裝。
Due to the bad weather, indoor games will substitute for the originally planned outdoor activities.
由於天氣不佳，室內活動將取代原先計劃的戶外活動。