名词
中文翻译：囊肿
同义词：
['cystic', 'cyst', 'sac', 'vesicle']
例句：
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1.The patient had a cystous swelling on the neck.
患者颈部有一个囊状肿胀。
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2. The cystous fluid was drained to relieve pressure.
排出囊液以缓解压力。
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3. Cysts can form due to various reasons such as infection or injury.
囊肿可以因感染或受伤等原因形成。