mode of onset

例句：

1. 1. The disease has a unique mode of onset.
   这种疾病有独特的发病方式。
2. 2.The study revealed that the virus spreads through a specific mode of onset.
   研究发现，这种病毒是通过特定的发病方式传播的。
3. 3.The research focused on understanding the mode of onset in this disease.
   该研究专注于理解这种疾病的发病方式。