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.
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。
They were approached by psychologists at three US universities searching for a way to switch the apparent gender of volunteers talking to each other through video conference software.
来自三所美国大学的心理学家与他们洽谈，以寻找一种办法，在进行通过视频会议软件进行交谈的实验中，改变参加实验的志愿者的外观性别。
Voltage detect of three phase AC, the warning of over-voltage, under-voltage, lost phase and power failure, two-way AC circuits switch full-automatically.
三相交流电压检测，过压、欠压、缺相、停电告警，全自动双路交流前换功能；
Voltage detect of three phase AC, the warning of over-voltage, under-voltage, lost phase and power failure, two-way AC circuits switch full-automatically.
三相交流电压检测，过压、欠压、缺相、停电告警，全自动双路交流前换功能；
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