As I mentioned in the Part 1, abstraction and modeling are two key skills.
正如我在第1部分提到的，抽象和建模是两项关键技能。
This abstraction of implementation details is key to flexibility: it enables you to swap out the implementation type completely without affecting the GUI.
这种对实现细节的抽象是灵活性的关键：它使您能够更换实现类型，而完全不会影响到GUI。
A key aspect of transformations is that they enable you to cross levels of abstraction.
转换的一个关键方面是，它们能使您进行各种层级的抽象。
Two key aspects, the level of abstraction and productivity offered to the developer, as well as the computational completeness and robustness of the language.
两个关键的方面，抽象的水平和给开发人员提供的生产力，以及语言的计算上的完备性和鲁棒性。
Composing functions in complex ways is the key to productivity in functional languages because you're continually raising your level of abstraction.
用复杂的方式组合函数，是函数性语言生产力的关键，这是因为这可不断提高抽象的层次。
The use of the class as the primary means of abstraction is key to object-oriented framework design.
作为抽象的主要方法，类的使用在面向对象框架设计中是很关键的。
To select the right level of abstraction is a key service modeling issue.
选择正确的抽象级别是服务建模的一个关键问题。
Management is the key to loose coupling-the core architectural principle behind the service abstraction.
管理是松耦合问题的关键，而松耦合是服务抽象的核心架构原则。
However, one of the key elements of Cloud Foundry is the abstraction it provides over such infrastructure.
然而，云计算的关键元素是抽象，它提供超越这样的设施。
Now that we have identified the key levels of abstraction, let's take a closer look at the relationships between them.
现在，我们已经标识了重要的抽象级别，让我们更深入地研究它们之间的关系。
As we noted earlier, this abstraction layer also complicates the use of advanced security controls, such as hardware security modules, possibly leading to poor key management procedures.
我们前面也提到了，这个抽象层还让先进的安全控制——像是硬件安全模块——的使用更加复杂，结果就可能是蹩脚的密钥管理程序。
Key techniques in OOAD include abstraction, decomposition, and separation of concerns (behavior vs. static characteristics), modularization and potentially inter-operable components.
OOAD中的关键技术包括抽象、分解和分离关系(行为与静态特征)、模块化以及潜在的内部可操作组件。
Service communication, interaction, and execution abstraction were in place, so the next key step was to establish well-defined interfaces between services.
服务通信、交互和执行抽象都已完成，因此下一个步骤就是在服务间建立经过良好定义的接口。
As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.
在嵌入式系统中，硬件抽象层作为嵌入式操作系统和硬件之间的软件层次是嵌入式应用的一个关键问题。
Abstraction and encapsulation are key to managing complexity.
抽象和封装关键是管理的复杂性。
Key frame can dramatically reduce the data of the video indexing, and provides a framework for video abstraction and retrieval.
关键帧的使用大大减少了视频索引的数据量，同时也为视频摘要和检索提供了一个组织框架。
Selection of optimal feature combinations is one of the key procedures for remotely sensed image classification and information abstraction.
最佳特征影像组合的选择是决定遥感影像信息提取与影像分类效果的关键环节之一。
The video scene cutting and the key frame abstraction are the two key technologies in the video abstraction.
视频场景切分和关键帧提取是视频摘要技术的两个关键内容。
The abstraction function and key invariants for the correctness of the code.
维持代码的正确性的抽象函数与关键常量。
Two key techniques accounts the most for a human-face recognition system: one is face detection and orientation; the other is feature abstraction and recognition from unified human-face image.
人脸识别系统主要包括两个技术环节：首先是人脸检测和定位，然后是对归一化的人脸图像进行特征提取与识别。
An abstraction is a description of the problem at some level of generalization that allows us to concentrate on the key aspects of the problem without getting Mired in the details.
抽象是问题在某些概括层次上的描述，它使得我们将注意力集中于问题的关键方面而不至于陷于细节的泥潭之中。
Key frame can dramatically reduce the data of the video indexing, and provide a framework for video abstraction and retrieval.
关键帧的使用减少了视频索引的数据量，同时也为视频和检索提供了一个组织框架。
The framework of video abstraction system in compressed domain is described, and main algorithms such as shot change detection, key-frame extraction and face detection are discussed.
给出了压缩域视频摘要系统的结构框架，并对其中的压缩域视频镜头变换检测、关键帧提取和压缩域人脸检测等主要算法进行了讨论。
Regarding special requirements on piano performance, it brings students on music attention to basic piano learning with abstraction and analysis on the key points of such learning.
本文从钢琴演奏的特殊要求出发，提出了音乐师范生必须重视钢琴基本功的学习，并简明扼要地分析了钢琴基本功的各个要点。
As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.
针对嵌入式系统开发平台构建中的硬件环境差异问题，给出了一种高移植性的硬件抽象层设计方案，并介绍了实现方法。
As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.
针对嵌入式系统开发平台构建中的硬件环境差异问题，给出了一种高移植性的硬件抽象层设计方案，并介绍了实现方法。
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