名词
中文翻译：环形环
同义词：
['annular', 'ring', 'circumferential', 'annulus', 'ring-like']
例句：
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1. Thesurgeon performed a delicate operation on the patient's neck to remove the annular rings.
外科医生在病人的颈部进行了一次精细的操作，以移除环形环。
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2. The annular rings were removed during the surgery to prevent infection.
手术中移除了环形环以防止感染。
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3. The annular rings are responsible for keeping the joint stable and reducing friction.
环形环负责保持关节稳定并减少摩擦。