A helpful but not essential feature is database navigation.
一个非基本但十分有用的特性是数据库导航。
He was like some drug or medicine to me, vitamin, which I took, but not essential.
他，像是我的一种药一样，维他命，我依赖，但是并不是必须的。
The operating system also contains other programs that are important, but not essential to making the computer run.
操作系统还包括其它的重要程序，但那些并不是使电脑运行的最关键程序。
NOTE: Past development experience, especially with Eclipse, is helpful but not essential to appreciating the topics presented in this article.
注意：过去的开发经验，尤其在Eclipse 方面的开发经验，对实现本文所述主题很有帮助，但这还不是最根本的。
Patients are beginning to refuse to have advisable, but not essential, surgery because they fear that their wounds will become infected with MRSA.
病人开始拒绝接受可取但非必须的外科手术，因为他们害怕他们的伤口被MRSA感染。
Perhaps struggle unfolds first, not at an economic or social level, but over the appropriation of air, essential to life itself.
也许首先展开的不是在经济或社会层面上的斗争，而是为占有对生命本身必不可少的空气而斗争。
"Aromatherapy oils" are not pure essential oils but dilutions.
“香薰精油”不是纯精油，而是稀释油。
What parents do, in other words, is of deep concern to the state, for the obvious reason that caring for children is not only morally urgent but essential for the future of society.
换句话说，父母所做的事是国家所深切关注的，原因很明显，照顾孩子不仅在道德上是非常需要的而且对社会的未来至关重要。
Working hard is not a guarantee of great success, but it is among the essential requirements.
虽然努力不能保证成功，但它是最基本的要求之一。
Dunbar is not against online relationships, but he maintains that face-to-face interaction is essential for the initial creation of true friendship and connections.
邓巴并不反对线上关系，但他坚持认为，面对面的交流对于最初建立真正的友谊和联系至关重要。
Both were essential and neither was superior to the other; they were not in conflict but complementary, each with its own sphere of competence.
两者都是必不可少的，没有一个是优于另一个的；它们互不冲突反而相辅相成，各有其本身的职权范围。
I try to take a close look at these in the book, with one chapter focusing largely on concurrency and object oriented design, which are essential to DI but that are often not associated as such.
我在书中力图搞清楚这些问题，有一章主要关注并发与面向对象的设计，这些在依赖注入中是要点，但是通常没有这样关联起来考虑。
The essential problem is not how good a communicator he is but the complexity of what he has to communicate.
根本问题不在于他的沟通能力有多强，而在于他必须表达的内容的复杂性。
These were essential accomplishments, part of his unequalled all-round technique, but not, I am sure, his, peculiar gift, especially amongst his contemporaries.
这些是基本的成就，是他无可匹敌的全能的技巧的一部分，但我确信不是出于他特殊的天赋，特别是在他的同代人当中。
In general, this modularity is necessary for programmers because it enables easy debugging and coding, but once the application is written, this modularity is not essential — or needed.
通常，这个模块化特征是程序员所必需的，因为通过其可以方便地进行调试和编码，但编写了应用程序之后，此模块化特征就不再重要了——或不再需要了。
Providing the ability to use a keyword argument is not essential, but it can make code with lots of arguments a lot clearer, and is not much extra work.
提供使用关键字参数的能力不是必需的，但它可以使带有许多参数的代码变得清楚许多，而且不需要大量的额外工作。
While you may want to do the same on Monday, your presence is likely to be not only required, but essential.
当你想要在周一做些同样的事情时，你的存在不仅仅是需要的，且是不可或缺的。
This chapter reviews essential practices not only to decrease the odds of a successful attack, but also to respond quickly when an attack inevitably succeeds.
这一章回顾了基本的实践，不仅包括减少成功攻击的机率，也包括当攻击不可避免时，很快地作出反应。
In facing global security and environmental challenges, China is not a threat, but rather our most important and essential partner.
在面对全球安全和环境挑战中，中国不是威胁，而是我们最重要和必不可少的伙伴。
The time involved was not small, but this was essential to the success of this part of our collaboration.
花在这个项目的时间不少，但是这对于这部分的合作学习的成功至关重要。
Painful austerity is an essential condition for lasting growth, but it is not enough on its own.
为了维持经济增长，痛苦的紧缩非常重要，但是仅仅是紧缩政策还不够。
Such knowledge is not needed for everyday use, but is an essential method of philosophical analysis.
这样的知识在日常生活中并没有用，但却是哲学分析的重要方法。
This might not be an essential feature, but it's one of the most desirable features because this makes the same services consumable in different scenarios.
这可能不是最基本的功能，但却是我们最想要的功能之一，因为这样可以在不同的场景中使用相同的服务。
It is not very interesting, but it is essential when trying to determine the impact of a change.
它也许不是那么有趣，但是很重要——当需要确定一个更改会产生那些影响的时候。
The UK premier admits that this "will not always be a comfortable discussion but it is in my view an essential one".
这位英国首相承认，这“不会总是一个舒服的讨论，但在我看来是十分必要的。”
Technological progress will be essential but, barring a breakthrough in nuclear fusion, it will not set us on a path to an energy system purged of fossil fuels.
技术进步将必不可少，但除非在核聚变技术上获得突破，否则我们无法借此建立一个没有化石燃料的能源体系。
The serializer is not technically part of the XSLT processor, but it is essential for practical use.
从技术上看，串行化器并不是XSLT处理器的一部分，但它在实际使用中是必不可少的。
The serializer is not technically part of the XSLT processor, but it is essential for practical use.
从技术上看，串行化器并不是XSLT处理器的一部分，但它在实际使用中是必不可少的。
应用推荐