Paper submitted with repeated sentences in the introduction
Regarding the repeated words, most people would not notice the the repetition at all. Regarding the sentence, they might be confused for a second, check back, see it's written twice, and continue as if nothing had happened.

Most will add a short note to the review, among those of other typos, that the sentence "..." appears twice. Nothing to be worried about, this alone will never cause a rejection of even major revision.