The shape recovery induced by the magnetic field was examined by a three-terminal capacitance method with the 13.3In specimen.Figure  shows the recovery strain induced by the magnetic field at 298 K, where a compressive pre-strain of about 3% was applied in the direction plotted with a filled circle in the stereographic triangle shown in Fig.
框框里的是什么意思？上面是一小段和这个图有关的句子

The shape recovery induced by the magnetic field was examined by a three-terminal capacitance method with the 13.3In specimen.Figure  shows the recovery strain induced by the magnetic field at 298 K, where a compressive pre-strain of about 3% was applied in the direction plotted with a filled circle in the stereographic triangle shown in Fig.
框框里的是什么意思？上面是一小段和这个图有关的句子