当材料断裂，荚囊就会打开并释放出修复介体，介体变成实体的复合物填补裂缝从而恢复材料的特性。
When the polymer cracks, the capsules break open and release the healing agent, which becomes polymer solid and seals the crack and restores the material's properties.
胰岛素瘤ct平扫：大多数表现为等密度，1例为高密度，1例为囊实性。增强扫描：实体部分均有强化。
In plain CT scan, most of the tumors showed isodensity, 1 case showed high density, 1 case contained both solid and cystic components.
胰岛素瘤ct平扫：大多数表现为等密度，1例为高密度，1例为囊实性。增强扫描：实体部分均有强化。
In plain CT scan, most of the tumors showed isodensity, 1 case showed high density, 1 case contained both solid and cystic components.
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