Condensed or mobile directory catalog.

压缩式或便携式目录编目。

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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。

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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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