这些阶段不一定有同样的作用。
Each one of these periods can be important, "he says — and they don't necessarily have the same effects."
所以这种惩罚不一定有执行力。
有机农产品和肉类不一定有更多营养。
Organic produce and meat do not necessarily have more nutrients.
人民党复苏，却不一定有所改变。
不一定有效，但的确能用在许多问题文档上。
This isn't necessarily foolproof, but it does work on a lot of problematic documents.
事实上，许多优秀人才并不一定有显赫的学历。
As a matter of fact, many exceptional people do not necessarily have an impressive academic background.
然而，每年秋分的日子都不同，在秋分不一定有圆月。
However, the Autumn Equinox is not a fixed day and there may or may not be a full moon on that day.
爱过以后才懂得，付出不一定有回报，甚至都不能收回。
After only know how to love, do not necessarily have to pay return, even can not be recovered.
在实际单片机应用系统中，单片机本身不一定有通讯功能。
In application of microcontroller systems, the microcontroller has not the function of communication due to simplicity.
Twitter最具影响力的消息源不一定有最多的关注者。
The most influential Twitter feeds don't necessarily have the most followers.
努力一定会有结果，但不一定有好结果。方向不对，努力白费。
Efforts will have results, but not necessarily a good result. Direction is wrong, efforts were in vain.
因为即使产品名称中带“水果”二字，产品中也不一定有水果。
Because a product has the word "fruit" in its name doesn't necessarily mean it actually has fruit in it.
读书人不一定有知识，真正的常识是懂得知识，会思想，能工作。
Reading people do not necessarily have the knowledge, real knowledge is to know the knowledge, thinking, can work.
有时候，做事不一定有结果。但它会带你认识新事物，认识更好的。
Sometimes things don't work out, which opens your mind to new things. Better things.
这种创造性不一定有必要寻找表达，它不是一种需要外在表现的天赋。
This creativeness may not necessarily seek expression; it is not a talent that demands an outward manifestation.
我们可以做，哲学的事，可以把我们因果的概念，说原因不一定有结果。
We could play around something with the business of philosophy to play around with namely our concept of causation and say that there can be causes that don't always have to be in effect.
另外，谈论“平均票价”不一定有帮助，因为那没把航班品质计算进去。
And talking about the "average fare" isn't necessarily helpful because that doesn't take into account the quality of a flight.
指出稳定、舒适的环境不一定有利于健康，它削弱了人体适应环境的能力。
Points out that a stable and comfortable environment is not necessarily favorable to health, by contrast, it undermines human body's ability of acclimatizing to the environment.
尽管这样的配置对于安全性不一定有价值，但是为了完整，这里仍然讨论一下。
While such configuration provides questionable security value, it is included here for completeness.
动物实验成本高昂，而且不一定有价值，科学家更愿意采用便宜可靠的替代方法。
Animal testing is expensive and can be of dubious value, and scientists would prefer cheaper and more reliable alternatives.
对某个话题的充分了解可能会让你听起来是个聪明的人，但对工作不一定有帮助。
Knowing a lot about a particular topic may make you sound like a smarty, but it won't necessarily help in the workplace.
我太太不一定有时间做什么好菜，不过，餐桌上多加一个盘子是绝对没问题的。%。
My wife won't have time to cook anything special, but she can put an extra plate on the table for you.
若认为气管插管不一定有困难，可不用肌肉松弛剂而在病人有自主呼吸时试行插管。
If there is some question about the difficulty of intubation, it can be attempted while the patient is breathing spontaneously, without giving a muscle relaxant.
然而，由于存在经济增长差异，有比较优势的产品，在国际市场上不一定有竞争优势。
However, due to differences in economic growth, products with comparative advantage do not necessarily have competitive advantage on the world market.
所以，我们说，本来一些合情合理的常规做法，到了装修行业，可能就不一定有效了。
Therefore, we say that's a number of reasonable standard practice, to the renovation industry, may not necessarily effective.
由项目管理办公室支持或负责日常事务的项目除了一起管理之外，彼此之间不一定有关系。
The projects supported or administered by the PMO may not be related other than by being managed together.
知识是智慧的基础，但是有知识不一定有智慧，培养创造力和想象力比拥有知识更加重要。
Knowledge is the basis of wisdom, but there is knowledge, not wisdom, foster creativity and imagination is more important than the possession of knowledge.
知识是智慧的基础，但是有知识不一定有智慧，培养创造力和想象力比拥有知识更加重要。
Knowledge is the basis of wisdom, but there is knowledge, not wisdom, foster creativity and imagination is more important than the possession of knowledge.
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