Intensive processing was required to parse data in the Presentation Services layer and extract the sub-set of data needed for a specific operation.
需要大量处理工作来解析presentation services层的数据，以及提取特定操作所需的数据子集。
Listing 3. Extract from the FOAF blog list processing code in bloginfo.py.
清单3 . bloginfo . py中实现从FOAF blog清单提取信息的代码。
The key idea for the proposed method is to extract the frequency components of the received signal and to perform signal processing in the frequency domain.
其关键思想是提取接收信号的频域成份，然后在频域中对信号进行处理。
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