Binary streams, for uninterpreted bytes of data.
二进制流，用于未解释的数据字节。
The value of a raw string literal is the string composed of the uninterpreted characters between the quotes;
原始字符串字面值表示的值就是由反引号之间的字符组成的字符串。
The messages, and any accompanying meta-data, are uninterpreted bytes as far as HTTPR is concerned and are assigned no other meaning by it.
就 HTTPR 而言，这些消息和任何附随的元数据都是未解释的字节，并且没有赋予它们其他的意义。
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