There is a performance overhead involved with readers/writers because they are intended for character streams, and they encode data to bytes under the covers.
读取器/写入器有性能开销，因为它们旨在用于字符流，且会在后台将数据编码为字节。
ASCII streams, for ASCII character data.
ascii流，用于ASCII字符数据。
Unicode streams, for Unicode character data.
unicode流，用于Unicode字符数据。
The character-oriented streams are less dramatic, providing just two formats.
面向字符的流比较单调，只提供两种格式。
The unique character of data streams brings a big challenge to traditional data processing methods.
数据流独特的特点，对传统数据的处理方法带来了很大的挑战。
The unique character of data streams brings a big challenge to traditional data processing methods.
数据流独特的特点，对传统数据的处理方法带来了很大的挑战。
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