名词
中文翻译：夹紧螺母
同义词：
['bolt', "screw nut例句：1. The car's engine is difficult to start with the key in the ignition.（汽车的引擎很难用钥匙启动。）2. The bolts holding the door shut are loose.（固定门的螺栓松动了。）3. The screw nut on the wall needs tightening.（墙上的螺丝需要拧紧。）"]
例句：
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1. The car's engine is difficult to start with the key in the ignition.
汽车的引擎很难用钥匙启动。
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2. The bolts holding the door shut are loose.
固定门的螺栓松动了。
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3. The screw nut on the wall needs tightening.
墙上的螺丝需要拧紧。