在生物学教学中，经常有一些较抽象和易混淆的知识。我在多年的教学实践中发现，如果把这些知识加以形象化并作恰当的比喻，既能增加教学的趣味性，又可使学生牢固地记住这些知识。现举几实例： （１）在讲叶绿体结构中的绿色基粒时，我把一个基粒比喻为一叠烙饼，每一张烙饼相 In biology teaching, there are often more abstract and confusing knowledge. In my many years of teaching practice, I have found that if we visualize this knowledge and make a proper metaphor, we can increase the interest in teaching and enable students to firmly remember this knowledge. Here are a few examples: (1) When talking about the green granules in the chloroplast structure, I likened a grain to a stack of pancakes,