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Discover LudwigSuggestions(4)
The phrase 'a has been' is not correct and usable in written English.
It does not make sense as a sentence fragment. To make a sentence using this phrase, you would need to specify more information, such as what "a has been" describes. For example, "Lisa has been a teacher for the past ten years."
Exact(24)
Group A has been predictable and uncompetitive.
Prototype A has been built.
Theorem A has been generalized and extended in several directions.
The expression of Napsin A has been shown to be transcriptionally regulated by TTF-1 [46].
Strobilurin A has been isolated from the fruit bodies.
Acute hepatitis A has been a notifiable disease in Germany for many years.
Similar(36)
The FS-A has been used in Taiwanese adolescents [ 27].
Botulinum toxin type A (BTX-A) has been used for prophylactic treatment in chronic migraine.
BTX-A has been shown to be a promising option for treatment of headache [20, 21].
BTX-A has been widely used for cosmetic and therapeutic purposes [24].
BTX-A has been used in a variety of oral and maxillofacial applications.
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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