求翻译：他上课活泼生动，精讲精练，鼓励同学，形式多样，总是利用实物，图片，简笔画，录音机，投影仪，表演等进行教学是什么意思？

His lively classes, Jingjiang refined to encourage students, in various forms, always use objects, pictures, stick figure, tape recorders, projectors, performances, teaching

His vivid and lively class precision and refined to encourage students, diverse forms, and always use pictures, in-kind, in short strokes, tape recorders, projectors, and performances for teaching

He attends class in a lively way vivid, the essence says concisely, encourages schoolmate, various formats, always uses the material object, the picture, the Jan stroke, the tape recorder, the projecting apparatus, the performance and so on carries on the teaching

His classes lively and vivid, by explaining scouring, encourages students, forms, always use real picture, stick, tape recorders, projectors, performance teaching

His classes lively and vivid, by explaining scouring, encourages students, forms, always use real picture, stick, tape recorders, projectors, performance teaching