toggle switch

noun
🔊/ˈtɒɡl swɪtʃ/
🔊/ˈtɑːɡl swɪtʃ/
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  1. an electrical switch that you move up and down or backwards and forwards 拨动开关;钮子开关
  2. (also toggle)
    (computing计算机) a key on a computer that you press to change from one style or operation to another, and back again 转换键;切换键