我听说过流，更具体地说是文件流.
I have been hearing about streams, more specifically file streams.
那么它们是什么?
它是否在内存中有一个位置?
Is it something that has a location in the memory?
它是包含数据的东西吗?
Is it something that contains data?
它只是文件和对象之间的连接吗?
Is it just a connection between a file and an object?
术语流是一种构造的抽象，它允许您发送或接收未知数量的字节.比喻是水流.您可以随时获取数据，或根据需要发送数据.例如，将此与具有固定已知长度的数组进行对比.
The term stream is an abstraction of a construct that allows you to send or receive an unknown number of bytes. The metaphor is a stream of water. You take the data as it comes, or send it as needed. Contrast this to an array, for example, which has a fixed, known length.
使用流的示例包括读取和写入文件、通过外部连接接收或发送数据.然而，术语stream 是通用的，并没有说明具体的实现.
Examples where streams are used include reading and writing to files, receiving or sending data across an external connection. However the term stream is generic and says nothing about the specific implementation.
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