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汉语拼音：xuán niǔ

边缘刻有一个或一系列标号的普通圆形突出物、圆盘或标度盘，可将其旋转或推进拉出，以此启动并操纵或控制某物（如收音机或电视机）

• This control allows you to set the maximum peak output level of the 166XL regardless of any other control.

  不管其它旋钮如何控制，该旋钮将允许你设置最大的输出峰值电平。

• The opening and closing angel of the cantilevers of the clothes rack can be regulated by a knob at the lower end of a hook.

  此款衣架可以通过挂钩下端的旋钮调整悬臂的开合角度。

• To the left of all that are a pair of small knobs, a switch, and two pushbuttons.

  这些的左侧是一对小旋钮、一个电门和两个按钮（译注：作者笔误，应该是3个）。

• The Demand Siders are brilliant, but they write as if changing fiscal policy were as easy as adjusting the knob on your stove.

  需求方是明智之人，但是他们的口吻似乎是，改变财政政策就如同调节你炉子的旋钮一样轻而易举。

• Set the frequency of simple, easy to operate, only an external potentiometer gently rotating the knob, you can set the frequency.

  频率设置简单，操作方便，只需轻轻转动外接电位器的旋钮，就可以进行频率设置。

• But as the labour progressed, the husband felt fine and asked the doctor to go ahead and bump it up a notch.

  但是，随着分娩的进展，丈夫感觉很好，要求医生多转来一些疼痛，把旋钮多旋一格。

• To the right of that light, above and between the PFD and ND, are two knobs; these control what systems are linked to the pilot's displays.

  灯的右边，PFD和ND上方中间的位置有两个旋钮；它们用来控制正驾驶显示器显示的系统信息。

• Modified mil dot reticle , Elevation knob , Windage knob Put the mouse cursor over the elevation and windage knobs to see the tops.

  放置指针在上升和风偏旋钮上可以看见旋钮上部。

• At the bottom are two knobs that control the temperatures of each of the two zones.

  面板底部的两个旋钮分别用于控制两个区域的温度。