该按钮是一个三向开关；它可以高亮显示绑定到数据模型的项目、未绑定到数据模型的项目或者无项目。

This button is a three-way switch; it highlights items that are bound to the data model, items that are not bound to the data model, or no items.

youdao

该按钮是一个三向开关；它可以高亮显示绑定到数据模型的项目、未绑定到数据模型的项目或者无项目。

This button is a three-way switch; it highlights items that are bound to the data model, items that are not bound to the data model, or no items.

youdao