'r '(默认值)表示从文件读取数据。

'r' (the default) indicates that you want to read data from the file.

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也可以从文件中直接读取二进制数据。

You can also read binary data directly from a file. The code.

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在内部，发出sys_read(或等效内容)以从文件中读取数据。

Internally a sys_read (or equivalent) is issued to read the data from the file.

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说明如何从文本文件中读取数据。

Demonstrates how to read from a text file.

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说明如何从文本文件中读取数据。

Demonstrates how to read from a text file.

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