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(门或抽屉的)球形把手
A knob is a round handle on a door or drawer which you use in order to open or close it.
例句
He turned the knob and pushed against the door.
他扭动把手推了推门。
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(柱子或棍子顶部的)疙瘩,节,球状物
A knob is a rounded lump or ball on top of a post or stick.
例句
A loose brass knob on the bedstead rattled.
床架上一个松动的球形铜扣发出嘎啦声。
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(机器或设备的)旋钮
A knob is a round switch on a piece of machinery or equipment.
例句
...the volume knob.
音量旋钮
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小块(黄油)
A knob of butter is a small amount of it.
例句
Top the steaming hot potatoes with a knob of butter.
在冒热气的马铃薯上放一小块黄油。