本设计受众群体不只针对盲人，普通家庭、单位也有必要加以应用。

This design is not only for blind people, also suit for ordinary family and company.

youdao

本设计受众群体不只针对盲人，普通家庭、单位也有必要加以应用。

This design is not only for blind people, also suit for ordinary family and company.

youdao