Translation of einmalig

He wants to say that peace and brutality are very connected. In one line he is talking about the cleanness and in the next line he is talking about the witches' broth. How good is that, isn't it?
She found it very unromantic that a man would not declare friendship to a woman. Anyway, after an hour or so they got off at a town called Chetumal which was on the border with Belize, where they lived.
Fortunately the bay we anchored was very calm and the ship did not move at all, or at least one could not feel it. We prepared for dinner and went to the deck, where everybody else was sitting.