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Discover LudwigSuggestions(5)
The phrase "are often complex and" is correct and usable in written English.
It can be used when describing something that frequently has intricate or complicated characteristics, typically followed by additional information.
Example: "The issues surrounding climate change are often complex and require a multifaceted approach to address effectively."
Alternatives: "tend to be intricate and" or "frequently appear complicated and".
Exact(60)
The rules are often complex and unclear.
Surrogacy laws are often complex and costly to interpret.
Existing neuropsychological tests are often complex and time-consuming.
However, biomolecular environments in vivo are often complex and dynamic.
Environmental problems are often complex and involve fundamental value contradictions.
Medication regimens for older adults are often complex and costly.
The seafood dishes, like Oceana's, are often complex and painstakingly constructed.
Managers' attitudes toward risk are often complex, and that psychological wrinkle needs to be acknowledged.
But just as rows about public art are often complex and surprising, so is this.
In the case of managers, that's because their roles are often complex and have little structure.
However, some of these methodologies are often complex and not very easy to apply.
More suggestions(15)
are often cumbersome and
are often sophisticated and
are sometimes complex and
are often multifaceted and
are typically complex and
are often intractable and
are generally complex and
are commonly complex and
are often problematic and
are often compound and
are often convoluted and
are often multi faceted and
are often transient and
are often harsh and
are often pedantic and
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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