difficult diagnosis

例句：

1. 1. The doctor'sdiagnosis was that she had a heart condition.
   医生的诊断是说她有心脏病。
2. 2. Thepatient's history made the diagnosis difficult.
   病人的病史使得诊断变得困难。
3. 3. Thedifficulty of the diagnosis led to further investigation.
   诊断的困难导致了进一步的调查。