MathML has an obvious role to play here, either as the native file format within the zip container or as an interoperability layer between different systems.

MathML在这里扮演一个明显的角色，即充当zip容器中原生的文件格式，或者作为不同系统之间的协作层。

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However, there is no trace in the output that this is a container file and it contains a file named test.txt in an encrypted format.

但是，在输出中确实看不出这是一个容器文件以及它包含加密格式的 test.txt 文件。

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Select the Format radio button and select the file system type to be used on the container file.

选择Format单选按钮并选择容器文件上要使用的文件系统类型。

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