The system adopts redundancy technique and error proof measure: communicating process uses a self-adapting protocol and CRC;
本系统采用了冗余技术和容错措施：系统中的通信过程采用了自适应协议和CRC差错检验；
Now you've got an error-proof piece of code that creates an XMLHttpRequest object and even lets you know if something went wrong.
现在已经得到了一段带有错误检查的XMLHttpRequest对象创建代码，还可以告诉您哪儿出了问题。
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