Cách sử dụng
"At length" is an expression used to describe someone who is speaking or writing about a topic in great detail for a long period of time. It can also refer to a situation that has gone on for a long time. For example, "The teacher talked at length about the history of the United States," means that the teacher spoke about the history of the United States for a long time, in great detail. Another example is, "The meeting lasted at length," means that the meeting went on for a long time. So, if you use the expression "at length," it means you are describing something that has been going on for a long time or someone is talking about something in great detail for a long time.