Such measures are desirable, if not essential.
这些措施即使不是必要，也是可取的。
Although not essential, some prior knowledge of statistics is desirable.
统计学的知识虽非必要，但最好是学过一点。
Money is not essential to happiness.
金钱对于幸福并非必不可少。
Catching to fashion is not essential to the happiness of all women.
赶时髦并不是对所有妇女的幸福都重要。
不过这并不是最重要的。
English ability is helpful but not essential.
能英文交流为佳，但并非是必需的。
Words not in bold are useful, but not essential.
非黑体单词有用，但不是最基本的。
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。
See now you still feel dynamic balance is not essential?
看到现在你还觉得动平衡可有可无吗？
Note that the use of the Velocity in this context is not essential.
注意，在本文中，Velocity的使用并不是必不可少的。
Exact mathematical precision and measurement are not essential.
准确计算及测量不是要点。
Some knowledge of quantum mechanics would be helpful but not essential.
掌握一些量子力学知识当然有帮助，但这并不是必须的。
Information that's not essential is deleted and what's left is compressed.
不重要的信息被删除，其余的被压缩。
For deletions this is not essential, but for other operations it can be important.
对于删除来说这并不重要，但对其他操作来说可能是重要的。
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。
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 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。
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。
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？”
"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。
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。
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。
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。
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