brain map

例句：

1. 1. To create a brain map, start by identifying the main topics and subtopics in your subject area.
   为了创建脑图，首先识别你的主题领域的主要主题和子主题。
2. 2. The teacher used a brain map to help students visualize the relationships between different concepts.
   老师使用脑图帮助学生可视化不同概念之间的关系。
3. 3. Students often use brain maps to organize their notes and study materials before exams.
   学生们经常使用脑图来整理笔记和学习材料，以便在考试前做好准备。