To be effective, it must be simple enough to communicate the required data structure to the end user, yet detailed enough that the database designer can create the physical structure.
为了是数据模型更加有效，它必须足够简单以使最终用户能够沟通必需的数据结构，同时它也要足够详细以使数据库设计人员能够创建物理结构。
Required data: The required data section displays a list of required data that must be set into various configuration files to run this action. It can be divided into two parts
需要的数据：需要的数据部分显示了一系列需要的数据，这些数据在各种配置文件中必须得到设置以运行该操作。
In Canada, a conformance strength of Populated has been adopted to fill a gap between Required and Mandatory, representing an element that must be supported with data (it cannot be empty).
在加拿大，已经采用Populated的一致性强度来填补了Required和Mandatory之间的空白，其表示必须使用数据支持的元素(其不能为空)。
Any time the utility cannot determine the correct way to migrate, it places the contents in a <required-cleanup> element, and the tool generates a message that the output must be fixed.
只要工具不能确定正确的迁移方式，它就会将内容放在
This id is a required list element in the ListModel that must be returned from this method, and it is used to identify the component instance in subsequent CAI interactions.
此ID是必须从方法中返回的ListModel的必需列表元素，它用于识别后续CAI交互中的组件实例。
Meanwhile, it is required that the free-form surface modeling must be able to change the freedom of local and meet all kinds of design requirements.
同时，要求自由曲面的造型必需能够局部地自由加以变更，使其符合各式设计需求。
Write YES to the output if it is possible to make a required route and NO otherwise. Note that answer must be written in capital Latin letters.
如果能安排一条所需的路线，则输出YES，否则输出NO，注意答案必需用大写字母。
Whatever the approach, it must be remembered that energy is required to lift water or to pump it through a filter.
不论采取哪一种方法，必须记住，提升水或用水泵将水输送通过过滤床都需要能量。
For the installation of equipments, it is required that the base of the equipment must be contacted tightly and neatly with the foundation.
在设备安装中，要求机械钢底座与基础面接触贴切、密实、平整。
It is particularly pointed out that attention must be given to control of the technical and operating conditions as required in order to achieve high yield of fine zinc powder.
对反射炉及其附属设备的结构作了重点介绍。特别指出了获得较高细锌粉产出率必须注意和要求控制的技术操作条件。
This is very useful to a shape analysis and recognition. However, it is required that every level shape of image must be faithful to the shape of the original picture.
分层对图形的识别和分析是很有用的，但是这要求每一分层对原图能保真。
This is very useful to a shape analysis and recognition. However, it is required that every level shape of image must be faithful to the shape of the original picture.
分层对图形的识别和分析是很有用的，但是这要求每一分层对原图能保真。
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