single instancing 单一实例 ; 单实例
Image sizes are smaller thanks to "single instancing," where a file appearing in multiple locations within the hard disk you're imaging is only stored once in the disk image.
镜像尺寸较小感谢“单一实例”，在一个文件中出现的多个地点的硬盘您成像是唯一一次在储存的磁盘映像。
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