In the earliest stage of infection, symptoms are non-specific and may be easily confused with more common diseases, including malaria, yellow fever, and typhoid fever.
在感染的最初阶段，症状为非特异性并可容易地与包括疟疾、黄热病和伤寒在内的较常见疾病相混淆。
2
When the novice teachers enter the teachers' post, they will all usually experience a confused and critical stage which is called the novice teacher stage or entrance to service stage.