For example, I can't forget your gentle words, which washed away the dust and sludge in my mind; I can't forget your mighty east wind-like exhortation and summon up the courage to move forward. Teacher, I am grateful to you all my life!

The teacher should speak in a kind and friendly tone. Be sure to use standard Mandarin with standard words, clear language and soft tone. In class, the speech speed should be moderate, and the language should be vivid, interesting and interesting.