ни ... ни

Ни ... ни - neither ... nor; no ... either ... or; does not ... either ... or

 We neither publish codes nor review them.

 Observations made during experiments, revealed no detectable changes in either the flow or the overall heat transfer rate. (... ни в потоке, ни в суммарном тепловом потоке)

 This paper does not consider either the justification for, or the acceptability of, the pollution levels.