用CT扫描副栉龙的冠饰，我们会发现这种动物会发出低频音，可以传向浓密的丛林深处。
CT scans of Parasaurolophus' crest reveals the animal likely trumpeted low-frequency sounds that traveled well within a dense forest environment.
方法对271例患者行副鼻窦轴扫和冠扫，分析副鼻窦疾病病变的类型、范围。
Methods Axial and coronal scan the paranasal sinus for 271 patients, to analyze the types and areas of paranasal sinus diseases.
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