Used and loved by millions
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
are primary components
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are primary components" is correct and usable in written English.
It can be used when discussing essential parts or elements of a larger system, concept, or structure. Example: "In the study of ecosystems, plants and animals are primary components that interact with each other and their environment."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Wiki
Alternative expressions(4)
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
7 human-written examples
O-Glycans are primary components of the intestinal mucins that form the mucus gel layer overlying the gut epithelium.
Science
Heat exchangers are primary components of liquid and hybrid cooling systems, and the effectiveness of a heat exchanger strongly influences the thermal performance of a cooling system.
Science
However, none of the potential precursors to PCB11 are primary components in any Aroclor mixtures.
Repetitive elements are primary components of the genomic sequence and the most important factors in genome size variations in higher eukaryotes.
Science
Regulations of temperature and water balance are primary components of homeostasis in all organisms, and insects are sensitive to ambient humidity levels they experience at any given time.
Interactions between collagen IV and laminin are known to be important for guiding the structural development of the kidney [ 28] and, in combination with heparan sulfate proteoglycans are primary components of the renal basement membrane [ 27, 28].
Science
Human-verified similar examples from authoritative sources
Similar Expressions
53 human-written examples
Hydrothermally altered gabbros in the lower oceanic crust often have lower δ18O values than mantle and can be primary components of arc lower crust.
Science
The BAPQ was designed to efficiently and reliably measure three personality and language characteristics that are considered to be primary components of the BAP [6].
Science
In Britain, import taxes are based on alcohol content, absinthe's primary component.
News & Media
Stiffened composite panels are primary structural components in ship, aircraft and aerospace vehicles.
Science
Merrill), protein and oil are primary nutritional components of mature seed.
Science
Expert writing Tips
Best practice
When using "are primary components", ensure the context clearly establishes what the components belong to. Clarity in defining the system or entity is key for effective communication.
Common error
Avoid using "are primary components" repeatedly in close proximity within your writing. Vary your language by using synonyms like "elements", "parts", or "aspects" to maintain reader engagement.
Source & Trust
78%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are primary components" functions as a predicative expression, linking a subject to its essential elements. It identifies and emphasizes the core constituents that constitute a larger entity. Ludwig's examples showcase its use in various contexts, affirming its role in defining fundamental aspects.
Frequent in
Science
60%
News & Media
20%
Encyclopedias
10%
Less common in
Wiki
10%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "are primary components" is a grammatically sound phrase used to identify the most important elements of a system or concept. As indicated by Ludwig, the phrase is correct and appropriate for use in written English. It's commonly found in scientific and technical contexts, as well as in news and media where defining key elements is crucial. When using this phrase, ensure clarity in defining the system and consider varying your vocabulary to avoid repetition. Remember that its level of formality is generally neutral to formal, fitting well into considered explanations and analyses. The numerous examples in Ludwig confirm its versatile application and frequent usage across varied fields.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are key elements
Replaces "primary components" with "key elements", changing the specific words used to indicate importance.
are essential parts
Substitutes "primary components" with "essential parts", using more general terminology.
are main constituents
Substitutes "primary components" with "main constituents", focusing on the composition of something.
are fundamental aspects
Replaces "components" with "aspects", shifting the focus to the essential nature of the elements.
are vital ingredients
Replaces "components" with "ingredients", implying that elements are necessary for a mixture.
are integral factors
Replaces components with factors, implying a more causative role of the elements.
are core building blocks
Uses a more figurative term, "building blocks", to emphasize the foundational nature of the components.
are critical pieces
Swaps components with pieces, using an analogy that implies being part of something bigger
are indispensable portions
Replaces primary with indispensable and components with portions, slightly increasing formality.
are significant features
Replaces components with features, emphasizing the importance of these elements as characteristics.
FAQs
How can I use "are primary components" in a sentence?
Use "are primary components" to indicate the most important parts that constitute a whole. For example: "Water and sunlight "are primary components" of plant growth."
What phrases are similar to "are primary components"?
Similar phrases include "are key elements", "are essential parts", and "are fundamental aspects". Each emphasizes the importance of certain aspects within a larger context.
How formal is the phrase "are primary components"?
The phrase "are primary components" is suitable for both formal and neutral contexts. You might find it in scientific papers, news reports, or general explanations. The formality largely depends on the surrounding vocabulary and sentence structure.
When is it not appropriate to use "are primary components"?
Avoid using "are primary components" when discussing trivial or insignificant elements. This phrase emphasizes importance, so ensure the components you are describing genuinely hold a central role in the subject being discussed.
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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
78%
Authority and reliability
4.6/5
Expert rating
Real-world application tested