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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
certain copies
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "certain copies" is correct and usable in written English.
It can be used when referring to specific versions or duplicates of a document, item, or material without specifying which ones. Example: "The publisher has decided to release certain copies of the book with a special cover design."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Alternative expressions(1)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
11 human-written examples
"When you have to send things or make certain copies, then you have to get in your car and go to Kinko's," he said.
News & Media
Before the mid-18th century, some European wares had found their way to China, as witness certain copies of early Meissen porcelain.
Encyclopedias
Certain copies are now in positions they originally had here in the artists' home during their lifetimes and this gives valuable insight into what the couple chose to hang.
News & Media
Then the selected antibodies proliferate into certain copies, and the copied and original ones are replicated in the current population.
As a consequence, certain copies arriving with the founders have a high occupancy in the current populations.
Science
It could also allow for certain copies to be inherited unchanged while other copies are recombined in novel experimentation.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
47 human-written examples
Their Gods that Failed are not just the City and Wall Street and various other citizens that annoy them but, in a smart rhetorical manouevre, certain copy-book moral failings: speculation, recklessness, greed, arrogance, oligarchy and excess.
News & Media
He took piano lessons and fell in love with show tunes from watching early cartoons, and by borrowing scores from the public library, which may still be missing a certain copy of Jule Styne's "Gypsy".
News & Media
While it's common knowledge that leaving sensitive personal information in trash bins or on computers raises the risk of identity theft, many consumers may not be aware that copying sensitive information on certain copy machines could also put them at risk.
News & Media
As speculation, perhaps at a certain copy number a gene conversion threshold is crossed so that the copies are more efficiently constrained to a single sequence.
Science
Based on this, we hypothesized that cells with a higher DM copy-number would divide more frequently up to a certain copy-number level, where the selection pressure would continuously shift to become less favourable (Figure 6A).
Science
Expert writing Tips
Best practice
When using "certain copies", ensure the context makes it clear why these copies are being singled out. Are they modified, of a higher quality, or subject to specific restrictions?
Common error
Avoid using "certain copies" without providing enough context. The reader should understand which copies are being referred to and why they are significant.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "certain copies" functions as a noun phrase where "certain" acts as a determiner specifying that only some, not all, of the copies are being referred to. As Ludwig AI confirms, the phrase is grammatically correct and widely used.
Frequent in
Science
50%
News & Media
41%
Wiki
8%
Less common in
Formal & Business
0%
Encyclopedias
1%
Social Media
0%
Ludwig's WRAP-UP
In summary, "certain copies" is a grammatically sound and frequently employed phrase to denote a subset of reproductions, signifying that not all copies are being referenced. As Ludwig AI states, it is usable in written English. Its usage is prevalent in scientific, news, and general writing contexts. When employing this phrase, ensure clarity by specifying the criteria that distinguish these particular copies. While alternatives like "specific duplicates" may offer greater precision, "certain copies" remains a versatile and understandable choice across various registers.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
specific duplicates
Replaces "copies" with "duplicates" to emphasize the identical nature of the items, while retaining the specificity indicated by "certain".
particular instances
Substitutes both "certain" and "copies" to highlight selected occurrences or cases, shifting the focus slightly from physical duplicates to specific events or examples.
selected reproductions
Replaces "copies" with "reproductions" to clarify the items are replicas, emphasizing the selection aspect with "selected".
definite iterations
Uses "iterations" instead of "copies" to refer to versions in a sequence or process, making it suitable for discussing software or design.
precise imitations
Implies that copies are made very accurately. Good if you are talking about art or design.
distinct replications
Replaces "copies" with "replications" to emphasize the act of reproducing, adding "distinct" to ensure a sense of separateness or uniqueness among the replicas.
some specimens
Offers a shift in context, using "specimens" to suggest examples from a collection or set, useful in scientific or analytical discussions.
respective versions
Focuses on individual versions, implying each is unique or tailored to a specific context.
determined prints
Emphasizes that the copies are physical outputs and that these have been pre-selected or determined.
individual units
Shifts the focus to copies as separate, countable items, useful in inventory or distribution contexts.
FAQs
How can I use "certain copies" in a sentence?
Use "certain copies" when you want to refer to a specific, but not explicitly named, subset of duplicates. For example, "The archive retains all originals, but only "certain copies" are digitized for public access."
What are some alternatives to using "certain copies"?
Depending on the context, you could use alternatives like "specific duplicates", "particular instances", or "selected reproductions".
Is it better to say "certain copies" or "specific copies"?
Both "certain copies" and "specific copies" are grammatically correct, but "specific copies" may provide slightly more clarity, as it directly indicates a known and defined subset. "Certain" implies a selection that might not be immediately clear to the reader.
What does "certain copies" imply about the copies being discussed?
"Certain copies" implies that only some copies, as opposed to all copies, possess a particular characteristic, are intended for a particular purpose, or are subject to specific conditions. The distinction is often crucial for clarity.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested