Your transform will take one of the two files as its primary input, and will use the content tag to read, parse, and load into memory the second file.
您的转换将采用两个文件之一作为其主要输入，并将使用内容标记来将第二个文件读取、分析和加载到内存中。
Reading data streams and writing results to streams is convenient, because the application does not have to read a large portion of the file, much less the whole file, into memory.
读取数据流并将结果写入流是很方便的，因为应用程序不一定要将文件的大部分（更不必说整个文件）读取到内存。
The files are decrypted when they are read from the disk into memory so that the file data kept in memory is in clear format.
在将文件从磁盘读取到内存时对文件解密，因此文件数据能够以明文格式保存在内存中。
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