C is not necesary, but it is useful to learn other languages.
学编程语言，c不是必学的，但是学好c有助于学好其他各种语言。
I hope that I can tell these to the person which in the behind me, but it is useful? May be not.
我真希望我能够把这些告诉那些我身后的人，但是这会有用吗？可能不会。
Consciousneas is not, properly speaking, a spectrum-but it is useful, for purposes of communication and investigation, to treat it as one.
确切地说，意识不是光谱，但把意识看做光谱有利于沟通和研究。
The format of the known_hosts file is beyond the scope of this article, but it is useful to take advantage of the comma-separated host names for each line.
known_hosts文件的格式已经超出了本文的范围，但是对每一行都使用一个以逗号分隔开的主机名会非常有用。
It has no back end repository to query against and is not enabled for production environments, but it is useful for simple test scenarios with staff support.
它没有用来查询的后端存储库，并且不支持生产环境，但对于具有人员支持的简单测试场景非常有用。
The first one that I will mention is actually something you thought maybe you could do with a single integral, but it is useful very often to do it as a double integral.
第一点就是，有些你以为是用一重积分来做的，但却通常是用二重积分来完成的。
This internal part of message Broker product is not exposed to developers, but it is useful to see how it works so that you can understand the architectural scalability of message flows.
MessageBroker产品的这个内部组件不会公开给开发人员，但是了解它的工作方式将非常有用，您可以通过它了解消息流的架构可扩展性。
This technique is useful but it has its limitations.
这种技术实用，但也有局限性。
The focus is really on eruptions in the last five years, but it might have some useful background material.
人们关注的焦点其实是过去五年的火山爆发，但它可能会提供一些有用的背景资料。
Algebra is not easy for everyone to learn, but it is very useful.
代数对每个人来说都不容易学，但它非常有用。
Marking a book is a useful skill, but it's important to do it right.
在书上做标记是一项有用的技能，但重要的是要做对。
These methods may be useful for a while, but it is difficult to solve this problem completely.
这些方法可能暂时有用，但要完全解决这个问题是很困难的。
And we should not imagine that it is. But it is a very useful tool.
并且我们也不应该这样设想，但是这确实是一个很有用的工具。
But it will illustrate why this is so useful.
但它会表明为什么这是如此有用的。
Large page is useful but it should be used in specific scenarios.
大页面是有用的，但是只应该在特定的场景中使用。
An odd name, but it is actually quite useful if you choose to use any of the widgets from the library in your code.
这是一个奇怪的名字，但是如果您选择在自己的代码中使用这个库的小部件，它就非常有用。
Yes, it serves a useful function but is it the main way of shopping for travel?
的确，这是一项实用的功能，但这是旅游购买的主要方式吗？
I made no attempt to do anything too fancy here, but it is a useful exercise to look at how a simple template can provide a substantial return in style and organization.
我并不打算在这里做一些太花哨的事情，但查看一个简单模板如何通过样式和组织提供丰厚的回报是一个有用的练习。
GTD is just a tool, but it is a very useful tool, and I highly recommend it for anyone trying to make dreams a reality.
GTD仅仅是一个工具，但它是一个非常有用的工具，我强烈推荐所有想要实现梦想的人们都来用它。
But it is probably more useful and certainly less dangerous.
但是它可能更加有用也无疑危险程度更低。
This file has a lot of information in it, but only a small part of it is useful to our purposes.
虽然这个文件中有很多信息，但是只有很少一部分对我们是有用的。
Now we must find a chemist but it is impossible to buy anything useful in Kuta.
我们只能去找药店，但是在库塔难以买到任何有用的东西。
Metadata for the cached items is useful, but it is also helpful to get metadata for each cache region.
缓存项的元数据很有用，但获取各个缓存区域的元数据也很有帮助。
It all sounds useful, but how is it going to make money?
这听起来很有用，但怎么能赚钱呢？
English is fairly useful, but it is rather difficult to learn.
英语相当有用，但相当难学。
You won't need to specify the -v flag on subsequent connections; but it is quite useful to do so while testing a connection.
在后续连接中不必指定-v标志，但该选项对测试连接颇为有用。
This is useful, but it might not be what you want.
这很有用，但可能不是您想要的功能。
This is useful, but it might not be what you want.
这很有用，但可能不是您想要的功能。
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