To guarantee that the header is processed only once in a given source file, we start by testing the #ifndef.
为了保证头文件在给定的源文件中只处理过一次,我们首先检测 #ifndef。
REPHEADER: report header; displayed once only at the beginning of the report.
报表页眉;只在报表的开始处显示一次。
An intermediary can only process the header entry of the SOAP message intended for it.
中介体仅可以处理传送给它的SOAP消息的头条目。
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