该路径可以与发布文件夹位置相同，但不必须相同。
The path can be the same as the publishing folder location, but this is not a requirement.
医生尽可能从中获利，就有进行昂贵但不必须的检查的强烈动机。
The doctor gets paid for everything he does, so he has a powerful incentive to perform costly, unnecessary procedures.
您可以受益于R，但不必须担心它的继承权问题。Cameron Laird在他的developerWorks文章R handyforcrunchingdata 中介绍了与 R相关的一些恰到好处的背景和参考资料。
You need not worry about its heritage to benefit from R. Cameron Laird provides some good background and resources related to R in his developerWorks article, R handy for crunching data.
当然，你也可以，而且也必须亲自参与其中，但不必始终耗在那里。
You can and should weigh in, of course, but you don't need to be there all the time.
跳转的目标必须是单个活动，但不必是基本活动；目标活动也可以是结构化活动。
The target of the jump has to be a single activity, however, it does not have to be a basic activity; it can be a structured activity as well.
由于国际学院是全部英语教学，应征者必须有流利的英文说写能力，但不必是以英语为母语者。
As all teaching in the International College is in English, applicants must be fluent in English but not necessarily native speakers.
那里要下雨，但不一定有一个“我”降雨了，你不必问，“谁在降落”在许多语言中，我们必须说“它”在下雨，这意味着有一个自我在雨中？
For there to be rain, there doesn't have to be an 'I.' rain happens; you don't have to ask, 'Who is falling?' in many languages, we have to say 'it' is raining, implying there is a self in the rain?
那里要下雨，但不一定有一个“我”降雨了，你不必问，“谁在降落”在许多语言中，我们必须说“它”在下雨，这意味着有一个自我在雨中？
For there to be rain, there doesn't have to be an 'I.' rain happens; you don't have to ask, 'Who is falling?' in many languages, we have to say 'it' is raining, implying there is a self in the rain?
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