10 Do not use when you are talking about actions or ways of doing things that have existed among a group of people for a very long time. Use or . Use to refer to something that is considered normal or polite, especially when you are talking about other countries or other times. Use to talk about the usual way of doing something in a particular area of life. 谈论某一特定生活领域中的惯常做法时,用 practice
habit tradition custom tradition custom practice