If what they did in the past was legal and proper, why is it necessary to grant them retroactive immunity?
如果他们所做的，在过去是合法和正确的，为什么要给予他们追溯免疫力？
If it's implied that each property has a getter and setter, and it usually is, why is it necessary to spell it out?
如果每个属性都具有一个getter和setter，并且通常如此，那么又何必详细说明呢？
A Sunday school teacher asked her children as they were on the way to a church service, "Why is it necessary to be quiet in church?" One bright little girl replied, "Because people are sleeping."
一位主日学校的老师在去教室的路上问她的孩子们：“为什么在教堂里要保持安静啊？”一个聪明的小女孩说：“因为人们在睡觉。”
To understand why they are doing it, it is necessary to know where they are coming from.
要理解他们为什么这样做，有必要知道他们的想法。
The most effective way of implementing change is to clearly describe the change, why it is necessary, and the benefits you expect.
实施变更最有效的方法是明确地描述变更，为什么它是必要的，以及您所期望的利益。
And if that is the case, it is always good to have all the necessary tools in hand and that is why we think assisted reproduction does make sense.
如果真的是那样，那么手头上有所有必要的工具始终是件好事，这就是为什么我们认为辅助生育确实起作用了。
For example, it is unclear why a registry is necessary to "Avoid duplication of effort"; it is the governing policy that can request that special procurement to be applied to avoid duplication.
例如，注册库对于“避免重复工作”的必要性就不 清晰；可以提出应用于避免重复劳动的特殊购买（即购买服务注册库）申请的主体是治理政策。
To grasp why the Internet might unravel, it is necessary to understand how, in the words of Mr Werbach, "it pulled itself together" in the first place.
要找到为什么互联网可能四分五裂的根源，就有必要了解它最初是怎样(按韦巴赫先生的说法)“自我相联”[自我救赎？]
For now, however, it becomes necessary to differentiate between null links and non-null links when generating output, which is why there are two distinct repeat sections.
但是目前在生成输出时，有必要区分空链接和非空链接，所以这里有两个不同的重复部分。
Before users move ahead to encounter a form, it is necessary to tell them why they need to do it and most importantly how they need to do it.
在用户遇到注册的表单之前，告诉他们需要做什么，怎样做是非常必要的。
One fine afternoon I was walking along Fifth Avenue, when I remembered that it was necessary to buy a pair of socks. Why I wished to buy only one pair is unimportant.
一个晴朗的下午，我沿第五大街而行，忽然想起需要买双袜子。
Why it is necessary for a company to get its new products into the market as quickly as possible?
为什么对于公司而言，让他们的新产品进入市场越快越好是必须的？
The difficulty for you, as a civilisation now is to listen to your higher self and to comprehend why it is necessary to do so more and more in the coming days.
你们的坚苦是作为一个文明，此刻就去谛听你的高我，并理解接下来的日子为何越来越需要作这些工作。
Now why is it so necessary? Why is it so important for China to host the Olympic games?
那真的很有必要吗？中国主办奥运会为什么很重要呢？
If someone asks you why he needs to watch this, and is that necessary to take such a long time to study it?
如果有人想您提这样的问题，我为什么要看这个节目呢？这么长时间，我还要研究它，有这个必要吗？
Now you know why it is so necessary to rid the Earth of the dark Ones power and influence.
现在你们知道为什么如此必要去掉地球上黑暗势力的权力与影响力。
As the subject of purpose, why must people observe those external tool norms? It is necessary to understand the theory about the moral origin again.
作为目的性的主体存在，人为什么要去遵守那些外在的工具性规范呢？为此，有必要重新解读关于道德起源的学说。
So why can the night owl so unmistakably predatory vole? It is also necessary to talk about its special body structure.
那么，猫头鹰为什么能够在夜间这样准确无误地捕食田鼠呢？这还要从它特殊的身体结构谈起。
In order to answer this question it is necessary to recall why depreciation is being charged.
为了回答这个问题，我们就需要回过头来看看为什么要计提折旧费用。
At first sight it is difficult to see why improvements on this method were necessary, or even possible.
乍一看很难看出为什么有必要改进这种方法，或者可能改进。
Assignment amounts, in a sense, to reorganization of an enterprise. That explains why it is necessary to obtain approval from the examination and approval authority.
因为转让股权在一定意义上讲等于是企业重组，转让股权时要由审批机关批准，是很有必要的。
Why is it necessary for the commander of a campaign or a tactical operation to understand the laws of strategy to some degree?
要求战役指挥员和战术指挥员了解某种程度的战略上的规律，何以成为必要呢？
Leadership arrangements of the work, the time required to complete the tasks, such as overtime failed to complete the task, it is necessary to promptly report to the leadership and explaining why.
领导布置的工作，要按规定的时间完成任务，如超时未能完成任务的，要及时向领导汇报并说明原因。
If necessary, you can continue execution of the program from that point to see what happens to the object and perhaps determine why it is not properly deallocated.
如果必要，可以从该点继续执行程序，以查看对象发生了什么情况，或许可以确定未正确释放对象的原因。
Now , I would like to express it more clearly why is it necessary and possible for Beijing to host the 2008 Olympic Games.
现在，我想更明确地阐述一下为什么北京有必要和有可能主办奥林匹克会。
The first part raises the question– why it is necessary to carry out the moral education in the multiple-value society.
论文第一部分提出了问题，多元价值背景下何以需要道德理性。
The difficulty for you. as a civilis now is to listen to your higher self to comprehend why it is necessary to do so more even better in the coming days.
你们的困难是作为一个文明，目下当今就去细听你的高我，并明白接上去的日子为何越来越须要作这些事情。
University students are often under tremendous amounts of stress, but do not always understand how to deal with it or why it is necessary to deal with it.
今天的大学生面临着就业、深造、感情等各个方面的巨大压力，但却常常不知如何应对。
University students are often under tremendous amounts of stress, but do not always understand how to deal with it or why it is necessary to deal with it.
今天的大学生面临着就业、深造、感情等各个方面的巨大压力，但却常常不知如何应对。
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