大多数疾病都是由细菌引起的。

Most of disease is caused from bacterium.

youdao

因此，我怀疑这是一种病毒，这种疾病是由细菌引起的。

So I doubt that this is a virus; this disease is caused by bacteria.

youdao

因此，我怀疑这是一种病毒，这种疾病是由细菌引起的。

So I doubt that this is a virus; this disease is caused by bacteria.

youdao