They can't use this piece of wood because it has too many
knobs.
他们没法用这块木头，因为它的树节太多了。
Eric twisted the
knob of the door and went inside.
埃里克转动门把手，然后走了进去。
Mary twirled the
knob of the door.
玛丽转动门把手。
The knob is only held on by sticky tape.
这个旋钮只是用胶带粘住的。
The Toio system consists of two robotic cubes that are equipped with sensors and can be controlled by a ring-shaped knob.
Toio系统由两个装有传感器的机器人立方体组成，可以通过环形旋钮进行控制。
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