简答题Lecture is a long talk on a particular subject that someone gives to a group of people, especially students in a university.简答题Defining is one of the skills utilized by the lecturer to introduce terms.简答题A lecture can be divided into four parts: lead-in, introduction, body and conclusion.简答题The following four expressions are all signals to change direction: Ok, so, all right, now.简答题Background information for a lecture is usually provided in the middle of a lecture.