名词
中文翻译：Unknown
同义词：
['circumferential scan', 'spiral scan']
例句：
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1. The circular scan of the area revealed a hidden tunnel.
该区域的圆周扫描揭示了一个隐藏的隧道。
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2. The spiral scan was used to map the terrain before construction began.
螺旋扫描被用来在施工开始之前绘制地形图。
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3. During the circumferential scan, the patient's vital signs were monitored closely.
在圆周扫描期间，密切监测了患者的体征。