lesson /ˈlesn/ n.［c］1.课；功课：This textbook has twenty lessons. 这课本有20课。take piano lessons from sb.跟某人学钢琴；have lessons 上课 do one’s lessons 做(预习或复习)功课：He was doing his lessons. 他正在做功课。2.教训：take a lesson from… 从…中吸取教训 The accident taught me a lesson. 这次事故给了我一个教训。