The phrase "a further trial" is correct and usable in written English.
It can be used when referring to an additional test or examination, often in a legal, scientific, or experimental context.
Example: "After reviewing the initial results, the researchers decided to conduct a further trial to gather more data."
Alternatives: "an additional trial" or "a subsequent trial".
A further trial of offering cocaine addicts vouchers to quit is under way.
Gregg, who helped design the new ESA, recommends a further trial before it is introduced nationally.
A further trial involving people with mild Alzheimer's disease is due to report at the end of this year.
He escaped and in a further trial was acquitted, on the doubtful grounds that he was not guilty and no longer insane.
Gereb was sentenced to two years imprisonment and is currently under strict house arrest pending the outcome of a further trial that began this week.
Eight of them, and two civilians, stood trial last year at Swansea crown court; a further trial of the others was due to follow this year.
The team behind the new device is planning a further trial using an FDA-approved continuous glucose monitor and an automated system for delivering the two hormones.
Until recently, he was due to face a further trial for allegedly pointing a gun at his girlfriend, but she later dropped the charges.
If a further trial goes well, Oxitec will apply for its first commercial licence which offers the prospect of earning money for the first time in the company's history.
Walters recalled meeting Payne and being immediately asked: "Do you like sex, Julie?" During what Payne claimed was a party to celebrate the making of the film, the police raided again and she faced a further trial.
A bitter controversy followed, but in the end the protagonists of the vaccine won when a further trial showed that the vaccine was safe and that it protected four out of five of those vaccinated.
