其中根据文本特点，摒除信息量小的部分，将标题、首部等作为标引源，提高了分类速度。
It gets rid of the part that is not important according to the text characteristics and improves the speed of classification by using title and heading as source of reference.
设计逐跳选项扩展首部白勺新选项，用以存储源地址验证信息。
A new option of hop-by-hop option's expansion header is designed to store the source address authentication information.
块首部包涵了一般的块信息，这些信息包涵诸如块地址以及段的类型（比如，数据或者索引）等。
The header contains general block information, such as the block address and the type of segment (for example, data or index).
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