然后它们尝试去追踪通过这些数据连接到每一块数据。
They then try to trace through every piece of data linked through those.
一块拼图是数据建模，另一块是数据库更改。
One puzzle piece is data modeling and another is database change.
RMAN将备份已经在数据库中使用的所有数据块。
RMAN will backup all data blocks that have ever been in use in database.
一旦写入数据块，元数据将随后写入日志。
Once they are written, the metadata changes are then written to the journal.
当将一个数据块写入活动磁盘时，该数据块也将写入备用主机。
When a block is written to the active disk, a copy of the block is also written to the backup host.
用哑数据(常是零或空白)充一个数据块。
分离一个数据块的各个部分。例如，从某个数据块中挑选出若干记录。
To separate the parts of a block, for example, to select records from a block.
只要数据块有可用的空间，那么就可以对已存在的数据进行更新操作。
Updates to existing data can use any available space in the block.
数据块是构成数据库的最小数据单位。
A data block is the smallest unit of data used by a database.
从传入的数据块中装载数据，并触发load事件。
Loads data from a passed data block and fires the load event.
从传入的数据块中装载数据，并触发load事件。
Loads data from a passed data block and fires the load event.
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