空气、水、衣服、及昆虫都会成为疾病的传染媒介。

Air, water, clothing and insects are all means of infection.

《新英汉大辞典》

接下来是细菌域，细菌作为传染疾病的媒介为人们所熟悉，但是实际上它们对于生态环境至关重要。

Then there are the bacteria—familiar as agents of disease, but actually ecologically crucial.

youdao

接下来是细菌域，细菌作为传染疾病的媒介为人们所熟悉，但是实际上它们对于生态环境至关重要。

Then there are the bacteria—familiar as agents of disease, but actually ecologically crucial.

youdao