polar cap 基本解释
n.行星两极处之极冠，南北极的冰帽；
polar cap 相关例句
权威例句
Polar capPolar capMagnetic activity in the polar cap—A new indexVariations in the polar cap area during two substorm cyclesF layer ionization patches in the polar capDependence of polar cap potential drop on interplanetary parametersPolar cap electric field structures with a northward interplanetary magnetic fieldGamma-Ray Pulsars: Emission from Extended Polar CAP CascadesA new source of suprathermal O + ions near the dayside polar cap boundaryElectric and magnetic field characteristics of discrete arcs in the polar cap
