adj.impossible to recover or recoup or overcome

同義詞：irretrievable

Retrieving the unretrievable in electronic imaging systems: emotions, themes, and stories
Retrieving the Unretrievable: Art, Aesthetics, and Emotion in Image Retrieval Systems
Oral litholysis therapy for endoscopically unretrievable obstructive pancreatic stones
Crushing the undeployed stent by another stent beside it--an alternative technique for unretrievable/undeployed coronary stent.
Extracorporeal Shockwave Lithotripsy for Endoscopically Unretrievable Pancreatic Duct Stones
How to retrieve the so-called "unretrievable"Amplatzer device: tips and tricks.
Retrieving the unretrievable in electronic imaging systems: emotions, themes, and stories
unretrievable remotely piloted vehicle
Altered fMRI Connectivity Dynamics in Temporal Lobe Epilepsy Might Explain Seizure Semiology
SAFTY DEVICE FOR A MOTOR VEHICLE INCLUDING A FRONT-END STRUCTURE