例如，文件类型可以是“可执行文件”、“目录”或“特殊”(任何别的类型)。

For instance, the type of a file could be "executable," "directory," or "special" (anything else).

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一种文件类型只能与一个已安装的可执行文件关联。

A file type can only be associated with one installed executable file.

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若要将多个可执行文件与一种文件类型相关联，必须首先为每个可执行文件指定条件，以确保对于给定的安装仅安装一个可执行文件。

To associate more than one executable file with a file type, you must first specify conditions for each executable file to ensure that only one will be installed for a given installation.

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