bubble map,circle map

map主要有: 圆圈图(circle map),树状图(tree map) 气泡图(bubble map
2,气泡图(bubble map)
(a bubble map is used for describing qualities.
让孩子英语表达滔滔不绝 导图选择: 气泡图(bubble map) 简介:两种导
双气泡图(double-bubble map—对比)