虽然对大多数历史学家来说，根据重要性对历史原因进行排序的必要性似乎是显而易见的，但这种等级制度引发了严重的哲学难题。
While the need to rank historical causes in some order of importance may seem obvious to most historians, such hierarchies raise serious philosophical difficulties.
然而，很少有人意识到基本技能的重要性。如图所示，班上的学生正在质疑学习诸如乘法表这样的基本技能的必要性。
However, few people realize the importance of basic skills. As is shown in the picture, the pupils in the class are questioning the necessity of learning basic skill such as multiplication table.
普通工人是非常重要的，他们被视作我们社会的必要组成部分。
Common workers are very important and they're considered the necessary part of our society.
本文首先介绍了采砂船监测系统的开发背景以及相关技术，得出研究本课题的重要性和必要性。
Fristly, this article introduces the developed background and key technology, educes the importance and necessarian of this article.
如果是由老师指导你的学习以及引导你在线讨论，那么，他们是否有做好这份工作的必要知识就是很重要的事情。
If teachers will be grading your work or leading you in online discussions, it is important that they have the knowledge necessary to do the job.
从你的工作日程中去掉那些重要但非必要的事，尝试一天，不要再想它们。
Clear important, but unnecessary items off your schedule for a day - and let them go.
对于系统级复用来说，获取必要的领域变化是非常重要的。
Capturing necessary variations in the domain is extremely important to systematic reuse.
实际上，更重要的是定义必要的数据字段，而不是决定这些字段作为元素还是属性。
In practice, it is more important to define the data fields that are needed rather than to decide on whether those fields should be elements or attributes.
对婴幼儿来说，连续频繁的母乳喂养和必要时的再哺乳都是重要的措施。
For infants and young children, continued frequent breastfeeding and, when necessary, relactation are important measures.
但出现这种梦有非常重要的意义：我们拥有必要的手段处理我们生活中的困难。
But when they do happen, they tell us something very important: That we have the necessary tools to deal with a difficult situation in our lives.
所以我们需要挑选出真正重要的任务（必要的或是你真的享受的事情），以便从混乱中解脱出来。
Distinguish between tasks that are truly important to you (because they are a necessity or because you truly enjoy these activities) and get rid of all the clutter.
如果一件重要的活动不在你的清单中，你将为此增添不必要的烦恼。
If an important action is not on your list, you'll worry about it unnecessarily.
这些重要的信息对于驱动系统的设计来说很有必要，因此不要忘记在用例中对它们建模。
This important information is needed to drive the design of your system, so don't forget to model it in your use cases.
家庭生活的重要性和灵活育儿教育的必要性早已成为了办公室文化的一部分。
The importance of family life, and the necessity of flexibility for childcare have become part of office culture.
这一点很重要，因为为企业模型维持合适的宗族关系是必要的。
This is important because it is necessary to maintain the appropriate ancestry for the enterprise models.
最重要的是强调在各处促进母亲及其孩子健康的必要性。
Above all emphasize the need to promote the health of mothers and their children everywhere.
队列和主题域的这一统一非常重要，有必要进行深入的研究。
This unification of the queue and topic domains is significant and deserves a closer look.
但是对于那些希望把社交媒体作为营销工具的人来说，具体什么时间贴出你的重磅日志或在微博上分享重要的链接，是非常有必要思考的问题。
Though for those of us looking to use social media as a marketing tool, it's worth thinking about exactly when you post that all-important blog or share your most valuable links on Twitter.
精确性不是必要的——重要的是知道应该关注什么。
通过过滤这个报告中的结果，您可以过滤掉不必要的数据，将精力放在对您有重要作用的数据上来。
By filtering the results that are displayed in a report, you can remove unnecessary data and focus on the data that is significant to you.
同样重要的是，需要确保任何后续部署都包含必要的更新。
Just as importantly, you need to ensure that any subsequent deployments contain the necessary update.
通过识别最重要的三个技术风险和最重要的三个有必要澄清的功能部分开始。
Start by identifying the top three technical risks and the top three functional areas in need of clarification.
无论开发者对他们浏览菜单的做出在怎样的决定，结果必须满足三个重要的必要条件：它必须要直观，易于使用和适当运作。
Whatever decisions developers make for the design of their navigation menus, the result has to fulfill three significant requirements: it has to be intuitive, easy-to-use and work properly.
所以简单生活就是尽可能地处理掉那些没有必要的和不重要的东西，为重要的东西留存空间。
And so to live simply is to rid your life of as many of the unnecessary and unessential things as you can, to make room for the essential.
当然，这些事情是非常美好的，但是它们之所以美好是因为你认为如此。更重要的是，这种比较是完全没有必要的。
Sure, those things are great, but they're only better if you believe they're better, and more importantly, the comparison is totally unnecessary.
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？
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?
对未来的太空旅行者来说，水冰至关重要，就目前的认知程度而言，水冰也是生命成长的必要条件。
Water ice is a critical resource for future space travelers, as well as a requirement for the development of life as it is currently known.
对未来的太空旅行者来说，水冰至关重要，就目前的认知程度而言，水冰也是生命成长的必要条件。
Water ice is a critical resource for future space travelers, as well as a requirement for the development of life as it is currently known.
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