1.  handle
2.  knob
3.  button

• 1. 钮: Button | knob | Command | unload button
• 2. 钮扣: button | fly button | Male and Female Buttoning
• 3. 单选按钮: radio button | Radio | option button | JRadioButton

更多释义

• 1.他转动着收音机的调谐钮。
  He turned the dial on the radio.
  dict.yoduao.com
• 2.大多用工字钮，四合钮，铆钉以及金属圈。
  Mainly use jeans button, snap button, rivet and eyelet.
  dict.yoduao.com
• 3.长按主选钮可以弹出应用程序切换器。
  Tapping and holding on the home button will popup an application switcher.
  dict.yoduao.com

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