Definition: a switch or other device used to operate a machine, such as a vehicle Level: B2
你的立体声音响的音量控制在哪里？
Where's the volume ___control on your stereo?
主要仪器在控制面板的中心。
The main instruments are in the center of the ___control panel.
机长坐在飞机的操控装置前。
The captain sat at the ___controls of the aircraft.
