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。
Do you have features in your product that are not essential to your customer's needs?
你的产品中有用户不需要的功能吗？
Therefore, it's not essential for a service to be a Web service, which is only one type of service.
因此，服务并不一定是Web服务，后者只是服务的一种类型而已。
It is fine to scan your whole code base for opportunities to use these features, but it is not essential.
在整个代码库中寻找使用这些特性的机会是不错的做法，但这不是必需的。
People often ask me, "Why should I care if a species goes extinct? It's not essential to my daily life, is it?"
人们总是问我：“我为什么要关注物种灭绝呢？它在我的日常生活中又无关紧要，不是吗？”
Exact mathematical precision and measurement are not essential.
准确计算及测量不是要点。
So I often think, the sound is it right? Just a kind of accessories, not essential.
所以我时常会在想，声音是不是只是一种附属品，可有可无。
Contrary to popular belief, eating solid food is not essential during short-term illness.
和大家通常的观念相反，在短期的小疾病中，吃固体食物并不是最关键的。
According to him, professionals are too concerned with money and with things not essential to music.
他认为，专业音乐人太注重金钱而忽视了音乐的本质。
In this application, sound greatly enhances the user experience, but is not essential to the main task.
在这个应用程序里，声音能极大地增强用户体验，但是对于主要任务来说并不是必需的。
It is not essential to build a storage or impounding reservoir if the water can be stored in the ground.
如果能将水储存在地下，就没有必要建造水库或蓄水池。
Symbols and elements are not essential in design and they themselves only could not build up good designs!
符号和元素既不是设计的必需品，自身也无法构成好的设计！
But it is not essential that this proof of the truth should constitute the first introduction to the idea.
然而，这并不是说，我们传授一个概念时，就必须先证明它的真实性。
It's not essential to give up alcohol completely. Some doctors think a little a day id actually good for you.
不用滴酒不沾。有些医生认为每天喝一点酒对健康有益。
"However, although a parent's desire to find a good match (for their child) is wise, it's not essential," he added.
他同时还说：“不过，尽管父母想为自己的子女找到一个合适的配偶是明智的，但绝非必要之举。”
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。
Our requirements may therefore include such wants - what we would like to have but are not essential for survival.
因此我们的要求可以包括这样的需要——我们希望得到的，而非生存的基本需要。
From this perspective, the differences between human beings and animals demarcated by Marx and Engels are not essential.
从这个根本点上来看，马克思与恩格斯在人与动物界定问题上的区别不是本质性的。
Omega 9 is not essential. It has fewer demonstrated health benefits, and our bodies produce it from other unsaturated fats.
欧米加9是非必需的，它很少表现对健康的好处，我们的身体能从其他不饱和脂肪中自己合成。
Attributes and adverbs, though they are not essential elements of a sentence, help to make the meaning clear or complete.
定语和副词，尽管它们不是一个句子的基本要素，有助于使句子含义清楚完整。
If mobile TV is not used enough to make money from advertising, it is also not essential enough to persuade lots of people to pay.
如果手机电视不能从广告商那边赚取足够多的钱，那么说服很多人去购买这种手机也就没什么必要了。
Canonical service components, that is, services designed as services from the ground up, are not essential to make this scheme work.
要使这套模式发挥作用，那些正规的服务组件，即那些从底层设计出来的服务，并不是必需的。
While it is not essential for an Intranet to have a physical connection into the Internet, the benefits can often outweigh the risks.
尽管对于内特网而言不必一定与因特网有物理联接，但是联接的好处经常大于风险。
Presumably, the abl protein, like the product of many other so-called housekeeping genes, is not essential in normal signaling pathways.
人们推测abl蛋白和其他许多看家基因的产物一样，对于正常的信号转导途径并不是必须的。
Law qualifications are not essential, although some family law solicitors and legal executives choose to train and practise as mediators.
法律资格并不是必须的，尽管也有一些家庭法律师和法律从业者选择作为调解员来培训自己或参加实习。
The sales information gets updated constantly in the sales table, but it is not essential that the executives get up-to-the-second information.
销售信息经常更新到sales表中，但这不是说经理们必须得到最新的信息。
Now that you’ve identified the essential, you can identify what’s not essential. What things in your life are not truly necessary or important to you?
既然你已经把重要的标记出来了，你也能将不重要的标记出来，在你生活里并非真正必要或重要的有哪些事？
Uniqueness: Although not essential, a site usually offers something unique either in terms of coverage or format compared to a similar print resource.
独特性：虽然并非必不可少，但与类似的纸质印刷材料相比，无论是覆盖范围还是编排格式方面，网站在提供信息时应具有一定的独特性。
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。
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。
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