虽然模式可以根据目的及输入输出参数的交互组合在一起，但组件模式的语义兼容性并不容易进行机械性的分析。
Although patterns may be combined, based on their intents and interactions of input and output parameters, semantic compatibility of the component patterns are not easily analyzed mechanically.
该系统实现了可编程输入输出（PIO）和超级直接存储器存取（UDMA）两种模式，实际运行效果良好，达到USB2 .0的高速率传输要求。
The system realizes two modes of PIO and UDMA. The running practice shows good effect and the high speed transmission of USB2.0 is achieved.
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