保障食品安全，其中最基本的则是需要从源头上寻找疫病源，从根本上切断疫病

保障食品安全，其中最基本的则是需要从源头上寻找疫病源，从根本上切断疫病传播途径。

結果 (英文) 1:

Food safety, which is the most basic need to find the source of the disease from the source, a fundamental disconnect disease transmission.

結果 (英文) 2:

To ensure the safety of food, one of the most fundamental is the need to find disease from the source, to cut off the spread of the disease means fundamentally.

結果 (英文) 3:

To ensure food safety, perhaps the most fundamental is the need to look for from the source of disease sources, fundamentally sever disease transmission.