noun
R
A round switch on a machine to control it.
Turn the knob to adjust the volume on the radio.
转动旋钮来调节收音机的音量。
R
A round handle on a door or drawer.
Turn the knob to open the door.
转动门把手来开门。
R
A round ball shape on the end of something.
The walking stick had a metal knob at the top.
手杖顶部有一个金属圆球。
R
A small piece of something like butter.
Add a knob of butter to the pan.
往平底锅里加一小块黄油。
R
A penis.