名词
中文翻译：拉长器
同义词：
['protractor', 'dorsal muscle']
例句：
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1. The protractor is used to measure the angle of a line when it is drawn perpendicular to the plane ofthe paper.
拉长器用于测量当直线垂直于纸面时的角度。
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2.The dorsal muscle is responsible for supporting the body's back and shoulders during walking and running.
背阔肌负责在行走和跑步时支撑身体背部和肩膀。
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3. During the surgery, the surgeon used a protractor to reposition the patient's spine before performing the spinal fusionprocedure.
手术中，外科医生使用拉长器来重新定位患者的脊柱，然后进行脊柱融合手术。