名词
中文翻译：左右螺母
同义词：
['left-handed nut', 'right-handed nut']
例句：
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1.The car had a right-and-left nut in the engine compartment.
这辆车的引擎舱里有一颗左右螺母。
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2.When he was fixing the car, he found a right-and-left nut on the side of the road.
当他修理汽车时，他在路边发现了一颗左右螺母。
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3. The mechanic had to remove the right-and-left nut before he could start the engine.
这位机械师在启动发动机之前必须移除这颗左右螺母。