one-time

Since the 1950s, fluoride has adapted itself to the prevailing concerns of the time.

Added to drinking water at concentrations of around one part per million, fluoride ions stick to dental plaque.

In his view, a writer has only one duty: to be present in his books.

Yet this, in the end, is a book from which one emerges sad, gloomy, disenchanted, at least if we agree to take it seriously.

But give the Kingdom credit for its sense of mercy: The lashes will be administered only 50 at a time.

Practise gliding in the form of inflection, or slide, from one extreme of pitch to another.

He alludes to it as one of their evil customs and used by them to produce insensibility.

There was a rumor that Alessandro and his father had both died; but no one knew anything certainly.

Truth is a torch, but one of enormous size; so that we slink past it in rather a blinking fashion for fear it should burn us.

It ended on a complaint that she was 'tired rather and spending my time at full length on a deck-chair in the garden.'