Cách sử dụng
"Expatiate upon" means to speak or write about a topic in great detail, going into depth and exploring various aspects of it. It's usually used in formal or academic settings, such as when giving a presentation, writing an essay, or discussing a subject with colleagues. For example, a teacher might ask a student to expatiate upon a particular historical event, or an author might expatiate upon a theme in their novel during a book reading. It's a slightly formal expression, so it's not something you'd use in everyday conversation, but it can be a useful term to know if you're studying or working in a field that involves academic or intellectual pursuits.