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Discover LudwigThe phrase "a closed system" is correct and usable in written English.
It can be used in contexts such as science, engineering, or philosophy to describe a system that does not exchange matter or energy with its surroundings.
Example: "In thermodynamics, a closed system is one where energy can be exchanged, but matter cannot."
Alternatives: "an isolated system" or "a sealed system".
Exact(57)
It's a closed system.
It's like a closed system.
So, is this really a closed system?
But it's a closed system, that's for sure.
The deer in Maryland are in a closed system.
It was a closed system, running on its own network.
Potter is a closed system, for aficionados only.
A closed system exchanges energy but not matter.
Similar(3)
The Gulf is a closed system with little freshwater inflow.
The bladder was filled with 50 mL of sterile saline using a closed-system technique [ 13].
In a small company you have more control because it is a "closed system".
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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