neurasthenia gravis

例句：

1. 1. He was suffering from a severe case of neuroasthenia gravis.
   他患有严重的神经衰弱。
2. 2.The patient's symptoms were consistent with the diagnosis of neuroasthenia gravis.
   患者的病症与神经衰弱的诊断相符。
3. 3.The doctor prescribed medication to help alleviate the patient's symptoms of neuroasthenia gravis.
   医生开了药来帮助缓解患者的症状。