I am sure he is a very nice boy, but not as a permanency.我肯定他是个很好的男孩子, 可是他没有常性。

It would be as a visiting professor for a year, with the possibility of a permanency.有可能是作为为期一年的客座教授, 也有可能成为终身教授。

They gradually realized the permanency of their condition.他们渐渐意识到, 他们将永远处于这种境地。