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Discover LudwigThe phrase "a first one" is correct and usable in written English
It can be used when referring to the initial item in a series or sequence. Example: "This is a first one in a series of tutorials designed to help beginners."
Exact(52)
A: First one we don't divulge.
Mr. Mossberg's appearances, which will regularly occur on Thursday mornings after a first one on Wednesday, are the first weekly segments by a Journal staff member.
A first one is based on the production using compact PET cyclotrons with 10 20 MeV protons via 14N p,α)11C reactions following an approach developed at the Lawrence Berkeley National Laboratory [2].
Three different approaches are now available if one wants to study these stability issues: a first one using symmetrization, another one via mass transportation and a third one based on the regularity theory for minimal surfaces and other PDEs.
As a couple, Janice and I built our 'second home' before having a first one.
He sent a first one this month, signed by hand, saying the tribunal was illegitimate and must therefore release him.
Similar(6)
Nottinghamshire captain Chris Read believes his side's "fantastic" batting line-up could be key to winning a first one-day knockout trophy in 24 years.
Lancashire earned a first One-Day Cup win of the season as they cruised to a 101-run victory over Derbyshire.
Tafel plots constructed from mass-transport corrected currents give slopes ranging from 0.080 to 0.160 V/decade for the different catalysts which suggests that a first one-electron step is rate controlling with the symmetry of the energy barrier depending on the nature of the ligand of the Co complex.
It presents the different steps involved in this design, namely the choice of the actuation principle (induction), its application to the case of a spherical geometry and two DOFs, the analytical and numerical modeling of the motor, and the sizing and the manufacture of a first one-actuated-DOF spherical prototype.
Indeed, two groups of H rabbits were identified: a first one which displayed enhanced AchE levels, and a second one which did not.
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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