unexampled

adj.

绝无仅有的，无先例的，空前的；

Unexampled Events, Resilience, and PRA
Action recognition using invariant features under unexampled viewing conditions
Strategic extraction: An unexampled epitome altering our profession
A Hybrid Inference Approach for Health Diagnostics with Unexampled Faulty States
A tri-fold hybrid classification approach for diagnostics with unexampled faulty states
Health diagnostics with unexampled faulty states using a two-fold classification method
Unexampled Exemplarity: Medea in the Argonautica of Valerius Flaccus
The West Walls Murder: “horrors … perhaps unexampled in the annals of modern crime”
Cloud Computing: Unexampled firmness of purpose of Java Technologies as for Security vulnerabilities and Cloud user's Interaction on...
“Portentous, unexampled, unexplain’d”: Poetry and Philosophy (abstract)