"strange alteration" — Collocation dictionary inglés

strange alteration collocation
Automatic translation (We do not guarantee its correctness): dziwna przebudowa
  1. strange adjetivo + alteration sustantivo
    Very loose collocation

    I was by no means certain that he had noticed the sounds in question; although, assuredly, a strange alteration had, during the last few minutes, taken place in his demeanour.