名词
中文翻译：关节囊
同义词：
['synovial bursa', 'synovial sac']
例句：
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1.The joint was swollen and painful due to an arthritis flare-up.
由于关节炎的发作，这个关节肿胀且疼痛。
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2.The doctor advised him to rest his injured arm for a week.
医生建议他休息受伤的手臂一周。
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3. The patient had to undergo surgery to remove the arthroplasty device.
患者不得不接受手术来移除关节置换装置。