Condensed or mobile directory catalog.
压缩式或便携式目录编目。
There are pros and cons to both the mobile directory catalog and the extended directory catalog.
便携式目录编目和扩展式目录编目各有利弊。
If an extended directory catalog is created and it is over 50 MB in size, use a mobile directory catalog instead.
如果创建了扩展式目录编目且大于50 MB，则使用便携式目录编目。
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