shields

n.

a protective covering or structure

armor carried on the arm to intercept blows

同义词：buckler

hard outer covering or case of certain organisms such as arthropods and turtles

同义词：carapaceshellcuticle

Mercury : visualization and analysis of crystal structures
A Geologic Time Scale
Electronic health records in ambulatory care--a national survey of physicians.
A Secure Routing Protocol for Ad Hoc Networks
A Secure Routing Protocol for Ad Hoc Networks
Calibration of mitochondrial DNA evolution in geese.
Use of Electronic Health Records in U.S. Hospitals
Horseweed (Conyza canadensis) seed collected in the planetary boundary layer
Intraaortic balloon counterpulsation with and without reperfusion for myocardial infarction shock.
Bradykinin and nerve growth factor release the capsaicin receptor from PtdIns(4,5)P2-mediated inhibition.