"She does not like vegetables and fruits."
Translation:ʻAʻole ʻo ia makemake i ka lau ʻai a me ka hua ʻai.
In this case the "i" is marking the grammatical object of the sentence. While "ia" is the one doing the liking (and so doesn't have to be marked), the fruit and vegetables are being liked and so must be marked with "i" to indicate their role in this sentence. The "a me" connects the fruit and the vegetables together into one conjoined noun. So they don't each need to be marked with "i" since they are acting as one noun phrase which just needs to be marked the one time.