名词
中文翻译：黑色螺栓
同义词：
['black nut', 'black screw例句：1. The bolts holding the door together were rusted through.（支撑门的螺栓生锈了。）']
例句：
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1. The bolts holding the door together were rusted through.
支撑门的螺栓生锈了。
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2.The car was so old that the bolts holding the doors closed wouldn't hold anymore.
这辆车太旧了，连着门都关不上的螺栓都松了。
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3. He tightened the bolts on the hinges to make sure they would hold the door shut.
他拧紧了铰链上的螺栓，确保门能关上。