模态可通过一种或几种媒介来实现，只是用一种模态的系统称为单模态，使用两

Modality can be realized through one or several media, but a system using one mode is called a single mode, and a system using two or more modes is a multi-mode. With the rapid development of information technology, with the help of multimedia and high-tech, more modalities have emerged. The modalities often no longer appear in a single form but are a combination of two or more modalities. Has become the norm in human life and communication

Modals can be implemented by one or more media, except that a system of a modal is called a single mode, and a system that uses two or more modes is a multimode. With the rapid development of information technology, with the help of multimedia and high-tech, more modals emerged, modals are often no longer in a single form but a combination of two or more modes, multi-modal has become the normal human life and communication.

Modes can be realized by one or more media. A system with only one mode is called single mode, while a system using two or more modes is multimodal. With the rapid development of information technology, with the help of multimedia and high-tech, more modes emerge at the historic moment. Modes are often no longer a single form, but a combination of two or more modes. Multimodality has become the normal of human life and communication<br>