名词
中文翻译：螺栓
同义词：
['nail', 'pin例句：1. The bolts onthe door are rusted and need tobe replaced.（门上的螺栓生锈了，需要更换。）2. He used a bolt to holdthe door shut.（他用一个螺栓把门关上。）']
例句：
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1. The bolts onthe door are rusted and need tobe replaced.
门上的螺栓生锈了，需要更换。
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2. He used a bolt to holdthe door shut.
他用一个螺栓把门关上。
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3. The bolts holding up the roofwere old and needed to be replaced.
支撑屋顶的螺栓旧了，需要更换。