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Discover LudwigSuggestions(5)
The phrase "are usually defined by" is correct and usable in written English.
It can be used when describing characteristics or criteria that typically establish the meaning or nature of something.
Example: "In academic writing, terms are usually defined by their context and usage within the field."
Alternatives: "are typically characterized by" or "are generally described by".
Exact(47)
Characteristically, these are usually defined by the episcopal see that espoused them.
These bacteria are taxonomically diverse and are usually defined by the electron donor that they use.
Descriptors are usually defined by their dimensionality.
De facto standards are usually defined by proprietary products rather than public specifications.
Five basic properties are usually defined by the well program and monitored during drilling.
Such structures are usually defined by non-uniform rational B-splines (NURBS) surfaces in industrial design software.
Similar(12)
Success in rallies is usually defined by crowd count and coverage.
In the troposphere, the demarcation between polar air and warmer tropical atmosphere is usually defined by the polar front.
It's a conceit that pays off well, given that Carroll's heroine is usually defined by her capacity for shrinkage, growth spurts and bouts of tears.
So the issue becomes happiness, which for stars is usually defined by championships, or at least the chance to compete for one.
The highlight of the tiny Scottish town's summer festivities is usually defined by its firework display and snaking pipe band procession along the main street.
More suggestions(16)
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are usually acidified by
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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