chronic

• Ten million americans are seeking medical help for chronic insomnia .
  有一千万美国人正在设法医治慢性失眠。
• These countries are beset by a chronic and serious unemployment problem .
  这些国家长期存在着严重的失业问题。
• Lymph node enlargement occurs early in chronic lymphocytic leukemia .
  慢性淋巴细胞性白血病，出现淋巴结肿大较早。
• Viral infections can cause that chronic progressive neurololgical disease .
  病毒感染可引起慢性进行性神经性疾病。
• Unfortunately, nonlistening seems to be a chronic human failing .
  遗憾的是，这种听而不闻的现象是人类常犯的过失。
• Prolonged exposure to these pollutants may result in chronic disease .
  长期接近这些污染气体，就会引起各种慢性疾病。
• The productive cough of chronic bronchitis is often not regarded as abnormal .
  慢性支气管炎的咳痰往往不被认为异常。
• Bleeding may be chronic and insidious or brisk and life threatening .
  出血可以是慢性和隐袭的，或是活跃和危及生命的。
• Chronic nonspecific ulcerative colitis is a disease with exacerbations and remissions .
  慢性非特异性溃疡性结肠炎这种病可以恶化亦可缓解。