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Discover LudwigThe phrase "are two copies" is correct and usable in written English.
It can be used when stating the existence or quantity of two copies of something, such as documents or items.
Example: "In the filing cabinet, there are two copies of the report for your review."
Alternatives: "there exist two copies" or "there are a pair of copies."
Exact(60)
There are two copies of this book at the Law Library, call number KF4242.F56 2009.
The result of Southern hybridization showed that there are two copies of LFY family genes in lily.
There are two copies of the manuscript each 129 pages in length and which appear to be identical.
Taped to the window is a sign—"You can be part of this dream: Book $19"—and there are two copies, one in English and one in Spanish, on the dashboard, in case they're able to make a quick sale at a red light.
Taped to the window is a sign — "You can be part of this dream: Book $19" — and there are two copies, one in English and one in Spanish, on the dashboard, in case they're able to make a quick sale at a red light.
On Level 4 at Tate Modern is a room hung with 40 framed magazine covers by John Heartfield, the German political artist and pioneer of photomontage; in the centre, open in a display case, are two copies of King's last book, John Heartfield: Laughter is a Devastating Weapon (2015).
Gothic literature, in complete contrast to the literature of the Enlightenment, was intended to create a purely emotional response in the reader.In the centre of the first room, under a portrait of Walpole with a jarringly benign expression, are two copies of "The Castle of Otranto" from the writer's own collection at Strawberry Hill.
There are two copies up for grabs.
There are two copies of Max Payne and three three-packs of Napoleon Dynamite,Sideways, and Office Space.
There are two copies of each of the reports and one copy of the roster of informants.
Thus, by rewriting the y-sequence signal as ({y_{N-1}, y_{N-2}, cdots, y_{0}}triangleq {x_{- N-1)},x_{x_{- N-1cdots, x_{x_{- N-1 concatenating it with the x-sequence signals, we actually obtain a long tent map analog code (except that there are two copies of x 0 here).
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com