? Item A, teacher's own use: the teacher's heart, taking the heart as the teacher, here means only trusting himself; For personal use, act according to one's own subjective intention. Describe self-righteous, opinionated and unwilling to accept the correct opinions of others. Item B: Gourmet: It used to mean delicious food, but now it has two meanings, one is that women are beautiful and charming, and the other is to describe beautiful natural scenery. Item C, Climbing into the room: Climbing and boarding; Hall, hall; Inner chamber. In ancient palaces, the front is the hall and the back is the room. Metaphor knowledge or skills from shallow to deep, step by step, and gradually achieve high achievements. Item D, eloquent, describes self-righteous reasons, endless, unreasonable and derogatory.