改变是必要的。
When it is necessary to change an identity between different user registries.
当需要在不同的用户注册中心之间更改标识时。
It is necessary to change the old views on charity and popularize the understanding of modem charity.
当前需要改变关于慈善的旧有观念，大力宣传和普及现代慈善意识。
With the steady development of society, it is necessary to change the model of association management.
随着我国社会的稳步前进，社团管理模式地转变也就成为了必然。
In order to adapt the variational light intensity, it is necessary to change integration time for optimal exposure.
为了适应光照强度的变化，通常需要改变积分时间来选择合适的曝光量。
If you do not think it is necessary to change your sheets in your room, please put the card on the pillow in the morning.
如果您认为您认为您的被单没有必要换洗的话，请在早晨的时候放一张小卡片(我想应该是注明不用洗涤的小卡片吧)放在枕头上。
Sometimes it is necessary to change the original form or even give up some brilliant images to obtain a functional equivalence.
译文往往需要改变原文的形式，甚至牺牲原文中精彩的比喻形象，以求得功能上的对等。
Sometimes it is necessary to change gearing when you change motors because of each motor's specific performance characteristics.
有时是必要的时候，你改变，因为每个发动机的具体性能特点马达来改变传动装置。
So it is necessary to change the concept and improve the measure and means of service to promote the rising of the service quantity.
要转变观念，改善服务措施和手段，促进读者服务工作质量的提高。
There is an assumption behind many Western therapeutic methods that it is necessary to change or modify our feeling state before we can take action.
西方疗法中存在一个臆断：在我们行动前有必要去改变或修正我们的感受。
It is necessary to change the social recognition of game, make policies of game authentication and explore those games of functions of education and psychological therapy.
为预防和改善网络游戏的负面影响，有必要转变社会对游戏的认识，研究制定优秀游戏认证制等政策，开发具有教育和心理治疗功能的游戏等。
Thirdly, it is necessary to change financing methods and use classifiable ways to manage the projects so that the realization in both obligations and risks can be stressed.
第三，改变筹资方式，分级负责，各负其责，增强资金使用的责任意识和风险意识；
Conclusion: it is necessary to change bad living habits for prevention of two types hypertension although there were different risk factors between two types of hypertension.
结论：两种类型高血压危险因素虽然是有差异的，但在防治中改变不良的生活习惯，控制体重对防治两种类型高血压都是必要的。
Quotations from other works, judgments, statutes, etc must be faithful to the original, except where it is necessary to change quotation marks from single to double, or vice versa.
除了必须从单引号改为双引号或反之亦然外，引用其它著作、判决、法令等必须忠于原文。
With carrying out the theories of new curriculum, the traditional teaching mode in physics classroom cant gear to the present needs, so it is necessary to change the old teaching mode.
随着新课程标准基本理念的实施，传统的中学物理课堂教学模式已经不能适应新课程的需要，中学物理课堂教学模式必须作出相应的转变。
All social problems in the human society including America are derived from human exchange system so that it is necessary to change the exchange system to eliminate all the social problems.
包括美国在内的人类社会一切弊端都置根于人类的交换方式，所以根除这些社会弊端必须改变人类的交换方式。
Part of the mobile phone shop to replace the low price of assembly parts, but not how long it is necessary to change, so the follow-up maintenance costs higher than the original accessories;
部分手机店更换组装配件价格低，但没有用多久又要换，因此后续维修费用比换原装配件更高；
This paper suggests that it is necessary to change people's out-of -date customs and strengthen protection of urban atmosphere environment through legislation, propaganda and resource protection.
建议从立法、宣传及爱护资源等方面来改变人们的陈规陋习和加强对成都市大气环境的保护。
What traffic teaches us is that reckless and uncontrolled change is as likely to harm us as it is to benefit us, and that thoughtful regulation is necessary for a better future.
交通教会我们的是，不计后果、不受控制的变化既可能造福我们，也可能伤害我们，而考虑周到的监管对更美好的未来而言非常必要。
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。
It is not necessary to clone the list before iteration or lock it during iteration because the copy of the list that the iterator sees will not change.
在对列表进行迭代之前不必克隆列表或者在迭代期间锁定列表，因为迭代器所看到的列表的副本是不变的。
If it is a necessary change, what is the best way to switch over?
如果有改变的必要的话，最好的切换方式应该是怎样的？
Such a change is all the harder for Americans to accept because few think it is either necessary or desirable-especially in relation to China.
这种变化是美国人非常难以接受的，因为很少有人认为有必要或值得——特别是在同中国的关系上。
It is also necessary to change some datasource Settings.
更改某些数据源设置也是有必要的。
In the case when rules define the execution of business process itself, it is necessary to consider their complexity and change frequency.
在规则定义业务流程本身的执行的情况下，必需考虑它们的复杂性和变化的频繁度。
It is about creating the kind of organizational change necessary to produce great software.
它是关于为了生产优秀软件所需创建的某种组织性变革。
But when the new prayer books were approved, as is legally necessary, by Parliament, Church lawyers forgot to change the 1949 Marriage Act so that it included the new wording of the banns.
但是，当新的祈祷书获得国会批准时，在法律上有必要对1949年的婚姻法做出改动，使之包含新的结婚公告词，而英国国教会的律师却忘记做这件事了。
But when the new prayer books were approved, as is legally necessary, by Parliament, Church lawyers forgot to change the 1949 Marriage Act so that it included the new wording of the banns.
但是，当新的祈祷书获得国会批准时，在法律上有必要对1949年的婚姻法做出改动，使之包含新的结婚公告词，而英国国教会的律师却忘记做这件事了。
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