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Discover LudwigSuggestions(5)
The phrase "are more efficient and" is correct and usable in written English.
It can be used when comparing the efficiency of two or more subjects or methods in a sentence.
Example: "These new machines are more efficient and cost-effective than the older models."
Alternatives: "are more effective and" or "are superior in efficiency and".
Exact(60)
Chickens are more efficient and fish even more.
Direct-heat methods are more efficient and usually tastier.
They believe that private schools are more efficient, and that competition improves outcomes.
It's because certification makes producers more sustainable – they are more efficient and more profitable.
Transparent markets are more efficient, and they are fairer to all participants.
"Lasers are more efficient and get superbright, but take a bigger headlamp," Mr. Song said.
Trains are more efficient and less polluting than lorries on all but the shortest routes.
Photovoltaic cells, the basic building blocks of solar panels, are more efficient and less costly than ever.
That is partly because industries are more efficient, and partly because industrial growth has moved abroad, where electricity is cheaper.
Wind turbines with nanomaterials are more efficient and cheaper, nanocrystal solar panels are just around the corner.
Formal mines are more efficient and easier to oversee, but require money and technology, of which the CAR has little.
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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