除了实际的数据外，DB 2需要维护强制的null指示符(1个字节)和长度信息(4个字节)。
In addition to the actual data, DB2 needs to maintain the mandatory null indicator (1 byte) and length information (4 bytes).
实际上，一旦实现这样的精细控制，他们几乎总是很讨厌它，因为这将给需要定义和维护所有元数据的用户带来负担。
In reality, they almost always hate it when it is implemented because it creates such a burden on the users who need to define and maintain all that metadata.
我们的评估：虽然必须维护用于生成不同数据格式的算法，但是实际的数据只需表示一次。
In our evaluation: While the algorithms to generate the various data formats must be maintained, the actual data need only be represented a single time.
活动和活动流是主要的抽象，由过程维护的数据实际上隐藏在过程变量中。
Activities and their flows are the main abstractions and the data manipulated by the processes is essentially hidden in process variables.
如果数据集非常庞大，试图在浏览器中使用一个ItemFileReadStore对其进行维护是不切实际的，因为这需要将所有数据下载到浏览器中。
If the data set is gargantuan, it's not practical to try to maintain it in the browser with an ItemFileReadStore, which loads all data into a browser.
实际上，IBMInfoSphereMDMServer是一个SOA应用程序，具有一套丰富的预定义业务服务，用于维护它的数据库中的主数据（或主数据引用）。
So, in essence, IBM InfoSphere MDM Server is an SOA application with a large set of predefined business services to maintain master data (or master data references) in its database.
根据现场实际，依靠可靠性数据统计方法，提出切实可行的维修维护策略。
A feasible maintaining strategy has been put forward according to the worksite practice and the statistic method of reliability data.
它具有数据抽象、信息隐藏等特点，符合人们对实际问题进行自然分解的思维方式，并能提高软件的可重用性、可扩充性和可维护性。
It is characterized by the data abstraction and information hiding, and is in conformity with the thinking mode of the natural decomposition of real problems.
数字水印是一种新的有效的数字产品保护和数据安全维护技术，它是一种十分贴近实际应用的信息隐藏技术。
Digital watermark is a new and effective way to protect digital products and to maintain the data security. It is a very practical information hiding technique.
通过加热炉运行参数及炉管数据模块实现对相关数据的维护与管理；在金相组织图谱模块中根据相应材料的标准组织图谱对实际金相图谱进行组织劣化等级评定；
The function of the first module is data maintenance and management, and in the second one actual metallographic photos can be graded according to the standard metallographic photos.
又按照支承辊的实际使用寿命，制定了支承辊换辊制度，并编制了支承辊使用与维护管理数据库。
They have also worked out, according to the rou's actual life, back up roll change regulation and compiled a data bank for back up roll service and maintenance.
又按照支承辊的实际使用寿命，制定了支承辊换辊制度，并编制了支承辊使用与维护管理数据库。
They have also worked out, according to the rou's actual life, back up roll change regulation and compiled a data bank for back up roll service and maintenance.
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