pin down

The researchers also plan to study phosphate veins within Ryugu samples to pin down more precise ages of the late fluid flow.

Her approach consists of combining aerosol and seawater samples with sediment records, satellite data and lab microcosms to pin down cause and effect.

Whether it’s a semi-ironic obsession with artisanal cheese-making, a random passion for sitar music or a stubborn preference for a flip phone, there are many wonderful contradictions about humans that algorithms can’t quite pin down.

GPs in England are being urged to "think again" if they see a sick patient three times and can't pin down a diagnosis, or find their symptoms are getting worse.

Blunt’s roller-coaster performance as a champion wrestler’s love — and perhaps his most dangerous opponent — is hard to pin down.