ownership of the memory resource; the lifetime of the resource is extended until all copies of the storage pointer are destroyed.
ownership of the memory resource; the lifetime of the resource is extended until all copies of the storage pointer are destroyed.对内存资源的共享所有权；该资源的生命周期将延长，直至所有该存储指针的副本均被销毁。
admin
ownership of the memory resource; the lifetime of the resource is extended until all copies of the storage pointer are destroyed.对内存资源的共享所有权；该资源的生命周期将延长，直至所有该存储指针的副本均被销毁。