The phrase "This prevents" is grammatically correct and can be used in written English.
It is typically used to introduce a statement about something that stops or hinders a particular action or outcome. Example: "This prevents any further delays in the project's timeline." In this sentence, the word "this" refers to a specific action or measure that has been taken to prevent delays in the project.
Exact(60)
"This prevents proper public scrutiny.
This prevents subsequent males from fertilizing eggs.
This prevents inappropriate behavior.
This prevents false positives.
This prevents from inconsistencies.
This prevents an immediate dump.
This prevents damage to the gearbox.
This prevents the choppiness. .
This prevents insect attacks.
This prevents confusion.
This prevents drips.
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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