mode of transmission的用法和樣例：
例句
- Since viral reservoirs and means of transmission are poorly understood, methods of prevention have not been developed.
因為惡性卡他熱病毒的儲主和傳播方式了解得很少，所以還沒有防制辦法。 - An international team of scientists is working to identify the hosts of the virus and mode of its natural transmission in the environment.
一個國際科學家小組正在努力查明病毒的宿主及其在環境中的自然傳播方式。
