In this opera [Tristan und Isolde (composed 1857–1859)] [Richard] Wagner has not only created a special euphonious and polyphonic atmosphere, but through the peculiar meaning of certain expressive sounds has produced effects never heard before, which through a magic emotion all over the work.

The emergency cars still answer all routine calls and one night a gentlehanded surgeon found himself helping to disarm a maniac with a shotgun.

Cabotage traffic may be carried by a foreign carrier on special permission of the civil aeronautics authorities […].

The overall movement of permeants through a polymer is called permeation, which is a multistep process.