我们已经了解到的情况是，随着我们纳入的时间跨度变长，这一记录提供了越来越多的证据表明气候在不同的统治期存在缓慢的波动。
What we do know is that as we include longer time intervals, the record shows increasing evidence of slow swings in climate between different regimes.
固定长度的记录要优于可变长度的记录，因为DB2代码专门为处理固定长度的记录进行优化。
Fixed-length records are preferred over varying length records, because the DB2 code is optimized for processing fixed-length records.
而对于可变长度的记录，其长度可能会变得不再适合初始页，因此必须将其转移到其他页。
However, a record of variable length can possibly be updated to a length that no longer fits on the original page, and so it must be moved to another page.
每个索引记录包含一个五字节的头，在它之前还有一个变长的头。
Each index record contains a five-byte header that may be preceded by a variable-length header.
对于每个非空的变长字段，记录头使用一或两个字节包含了列的长度。
For each non-NULL variable-length field, the record header contains the length of the column in one or two bytes.
每个记录参考一个相关数据的可变长度存储器，一个64位key。而一个创建和删除处理ID根据这个key被索引。
Each record references a variable-length store of related data, a 64 bit key, and a creation and deletion transaction id which is indexed along with the key.
每个记录参考一个相关数据的可变长度存储器，一个64位key。而一个创建和删除处理ID根据这个key被索引。
Each record references a variable-length store of related data, a 64 bit key, and a creation and deletion transaction id which is indexed along with the key.
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