one and the same
Identical, as in Gloria's grandfather had been, at one and the same time, a physician at the court and a general in the army. This expression is an emphatic form of “the same.” [Mid-1800s]
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How to use one and the same in a sentence
As an example of good science-and-society policymaking, the history of fluoride may be more of a cautionary tale.
Added to drinking water at concentrations of around one part per million, fluoride ions stick to dental plaque.
None of these, though, has inspired quite the same backlash as fluoride.
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.
Practise gliding in the form of inflection, or slide, from one extreme of pitch to another.Expressive Voice Culture|Jessie Eldridge Southwick
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.Ramona|Helen Hunt Jackson
I waited three months more, in great impatience, then sent him back to the same post, to see if there might be a reply.The Boarded-Up House|Augusta Huiell Seaman
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.Pearls of Thought|Maturin M. Ballou