first ever

adj.

首次的；前所未有的；史无前例的；

The Greater Cincinnati/Northern Kentucky Stroke Study: preliminary first-ever and total incidence rates of stroke among blacks
Incidence and occurrence of total (first-ever and recurrent) stroke.
Prediction of in-hospital mortality after first-ever stroke: the Lausanne Stroke Registry.
Ten-Year Risk of First Recurrent Stroke and Disability After First-Ever Stroke in the Perth Community Stroke Study
Five-Year Survival After First-Ever Stroke and Related Prognostic Factors in the Perth Community Stroke Study
Greater Cincinnati/Northern Kentucky Stroke Study: volume of first-ever ischemic stroke among blacks in a population-based study.
Long-Term Disability After First-Ever Stroke and Related Prognostic Factors in the Perth Community Stroke Study, 1989–1990
Time course of sleep-related breathing disorders in first-ever stroke or transient ischemic attack.
Long-term survival after first-ever stroke: the Oxfordshire Community Stroke Project
Analysis of 1008 consecutive patients aged 15 to 49 with first-ever ischemic stroke: the Helsinki young stroke registry.