You'll have to unscrew the handles to paint the door.

要漆这扇门，你得把螺丝拧开，缷下门把手。

《牛津词典》

And now to unscrew all the screws.

现在就拔螺丝所有螺丝。

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To pull the string, the crew has to unscrew it, or break it out, into smaller lengths, or stands.

为了起出钻具，钻井工人要把钻具分解成长度较短的单根或立柱。

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After several failed attempts to unscrew the bolt on the handrail, the spacewalkers ended up tearing it off with brute force.

BBC: Brute force helps Hubble renewal

Muddy water dripped from my hair into my eyebrows, lashes, and eyes, as I knelt to unscrew the lever that activated the rear brake.

NEWYORKER: Swimming

The newest Intel Pentium chip has such densely packed circuits that it consumes the same power as a 100-watt lightbulb with a filament burning as hot as 4, 500 degrees Fahrenheit--one you'd have to wear mittens to unscrew.

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