To overcome this, we picked the concept of streams: a stream (input or output) only deals with a subset of the data of an element.

为了克服这点，我们使用了流：一个流(输入流或输出流)只处理单个项的数据子集。

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Users can stream the output data into a string, an internal buffer, the standard output, or a file.

用户可以使这些输出数据流入字符串、内部缓冲区、标准输出或文件。

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The output data might be in a different format from the original stream.

输出流可能不同于原始的流。

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