WHILE的用法

寂寞的自由

it cause在这里做DISEASE的定语，省略了THAT，因为THAT做定语从句中的宾语。
NN们，自由菜鸟说的对不对啊？请确认，谢谢。

allaneli

你讲得没错，但是 it 还是指代 bacterium.

braveMBA

Actually, there is no any meaning to discuss what 'it' in A refers to because A is wrong, and one of the most important reasons is that 'it' is blurry in A because 'it' may refer to 'bacterium' while seemly referring to 'the disease'.