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The phrase "field is required" is correct and usable in written English.
It is typically used in forms or applications to indicate that a specific input is mandatory.
Example: "Please fill out all sections of the form; the name field is required."
Alternatives: "This field must be filled" or "Field cannot be left blank."
Exact(57)
To explain Fig. 2, it should be noted that by increasing the beam density n b and the kinetic energy of electron γ, the self-fields increase, therefore, a stronger ion-channel density (or axial magnetic field) is required for the onset of instability.
An externally applied magnetic field is required.
Subject * This field is required.
Your email * This field is required.
Send to * This field is required.
Page to be sent GHB, aka "liquid ecstasy" Your message * This field is required.
A bachelor's degree (in any field) is required to register for the Certificate Program in Interior Design and Interior Architecture.
Minimum qualifications include a Ph.D. in Computer Science, Electrical Engineering, Statistics, Astronomy or closely related field is required.
Similar(3)
Will some type of work experience in the field be required?
"The reality is I was not an evolutionary biologist," he responded, as if study in that one field was required to address the issue.
Will the field be required?" Didn't David Beckham score his wondergoal against Colombia on the first Friday night of Glastonbury in 1998?
More suggestions(15)
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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