虚拟化学老师 - 分子反应可视化 (Chemistry Lesson) [00-05s] Virtual Teacher Intro: A friendly, photorealistic AI avatar teacher (female, glasses, lab coat) stands in a modern, bright virtual laboratory. She holds a glass beaker containing a clear liquid. She smiles and says (lip-sync): "Let's look at the molecular level." [06-10s] Microscopic Zoom: The camera zooms into the beaker, passing through the glass and into the liquid. The view shifts to a 3D animation of water molecules (H2O) floating. Another substance is added, and we see the atoms reacting, bonding, and changing colors explosively (visualizing a chemical reaction). [11-15s] Real-world Application: The camera zooms back out to the teacher. The liquid in the beaker has changed color to bright pink. Floating text summarizes the formula. The teacher gives a thumbs up. Text overlay: "Visual Learning | Master Chemistry Easily." Clean, high-tech educational style.