This clear mind map of linguistic symbols showcases key components such as elements and attributes, with further detailed content under each component. With this structured view, one can better memorize and organize knowledge about language.

This is a clear mind map of electrical resistivity, which mainly explains what electrical resistivity is, the units of electrical resistivity, closed circuits, electronics, etc. Each content is further explained at several levels. A mind map is a visual thinking tool that is presented through the radioactive structure of a central idea or problem. It consists of themes, branches, and keywords, aiming to mimic the neural network structure of the human brain. This graphical approach helps promote memory, organize information, and stimulate creativity.