I think you should differentiate between reusing single sentences that are just a normal way of conveying certain information, and reusing ideas/concepts.
For example, most of my papers deal with the same disease. I always describe this disease with the exact same sentence in the Introduction section (i.e. it's characterized by these and these symptoms, median survival is 5 years). I see no need to formulate that kind of information differently in each paper. I do not cite my own papers for this and do not make it a quote. This kind of thing is totally ok and not considered (self) plagiarism.
On the other hand, I also have a paper describing a certain method and then follow-up papers that use that method somewhere. In these sections I also sometimes repeat exact sentences, but I do cite the previous paper. Here it is an original idea that I'm reusing and I shouldn't give the impression I came up with it anew in each paper.
The submission being anonymous does not change anything; if the reuse is significant enough to warrant a citation, you need to cite, regardless whether the original work was written by you or someone else.
In short, repeating exact sentences is in many cases acceptable; whether a citation is needed depends on what kind of information in conveyed in that sentence. You are in the best position to judge in which category your reuse falls.