A typical ack from this client does contain a SACK option for data higher than has been seen before, but it also contains sequence references to the immediately prior packets as well.
来自此客户机的典型应答包括一个SACK选项，它指向比前面出现的数据更高的数据，但它也包含指向前一个相邻包的序列。
Prior to DB2 UDB V8.2, a Unicode database could only be defined with the collating sequence IDENTITY, which means that the characters are compared by their byte encoding.
在DB 2 UDB V8.2之前，Unicode数据库只能定义为排序次序identity，这意味着按照字节编码对字符进行比较。
Prior to use: Read through the steps and practice the visualizations and their sequence slowly for familiarity.
使用前：阅读所有的步骤，练习观想，并慢慢熟悉其顺序。
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