问题是当时没有理论解释这一点。
目前还没有理论上定论的检测方法。
而在实际操作上，事情远没有理论简单。
没有理论的支持，从何而谈技巧的应用。
Without the support of theory, we lack solid foundation when we form our skills.
但是，没有理论能够证明二者之间的因果关系。
But there is little academically accepted evidence of a causal relationship.
没有实践就没有理论。
虽然没有理论依据但是看起来应该是正确的。
没有理论与实践的紧密结合，也就没有环境科学。
There is no environmental science without the close combination of theory and practice.
目前，没有理论可以预测材料在成核过程中是好还是坏。
At the moment, there is no theory able to predict which materials are good or bad at nucleating ice.
但至今为止只是有学说揭示了这点，但并没有理论支持。
But all the studies done so far have debunked this theory and there is simply not enough evidence to support it.
大量的批评主要是谴责这篇报告(也是以科学形式出版的)没有理论支持。
A number of critics condemned the report (also published in Science) for making claims it couldn't back up.
没有普遍性即没有认识，没有科学，没有理论，但普遍性不是超历史的。
Without universality, there will be not cognition, science and theory, but universality doesn't go beyond history.
前者只看到了实践的重要性，实际上，没有理论的实践就像没有引擎的汽车；
The former one only focuses on the importance of practice, but in fact, practice without the guidance of theory is just like a car without an engine.
但是，正常情况下，一个人不吃补药也应当是是健康的；没有理论也应当是幸福的。
But when things are normal a man should be healthy without a tonic and happy without a theory.
作者认为缺少文化层面所建立的生育观念的管理是没有理论和合理观念的无原则管理。
The author holds that, being short of a cultural dimension, fertility management will decay toward non-principled management with neither theory-backups nor rational ideas.
所以说，没有理论意义上的“最好”的学习方法，只有现实经验中的“适合”的学习方法。
Therefore, there is no “the best” method in theory, but the “proper” method in practice.
但是当事情是正常情况下，一个人的健康应该不需要药物快乐没有理论。这真一件简单的事。
But when things are normal a man should be healthy without a tonic and happy without a theory. It is the simple things that really matter.
一些专家现在认为也许平均寿命根本没有理论上的限制，他们指出过去几十年中百岁老人的数量大大增加。
Some experts now think there may be no theoretical limit at all, pointing to the huge rise in the number of centenarians in the past few decades.
肥胖毫无疑问会增加你得病的风险，但并没有理论依据可以证明吃有机食物，或者其他种类的食物就有效。
Being obese definitely increases your risk of severe disease but there is no evidence that eating organic food, or any other kind, helps at all.
大部分研究只是从语言学层面上研究新闻翻译，有些是采用实例陈述某些翻译原则或方法，没有理论支持。
Most of the studies were confined to researches on its linguistic aspect, and adopted practical cases to demonstrate some translation principles or methods without strong theoretical support.
另外，如果只有从0到有一条路，并且0是很难到有的，没有理论的，那么对后来出现的世界也是太残酷了。
In addition, if there is a road from 0 to ens, and it is very difficult from 0 to ens, there is no theory, then for the later world, it is too cruel.
得流感的人被告知要多食用流体，但最近的研究并没有理论依据证明此结论，而且有迹象证明，过多的流体将对肺炎有危害。
People with flu are told to drink plenty of fluids, but a recent review found no evidence for or against this, and some signs that too much fluid can be harmful in pneumonia.
霍金批评哲学总是玩一些无关紧要的文字游戏，有人同情他说，对于一个没有理论想象力的人而言，哲学一定是无关紧要之极。
Hawking criticises philosophy for playing trivial word games and one sympathises: it must seem awfully trivial to a guy with no theoretical imagination.
实际上，他写的是一篇关于预测技巧的正儿八经的论文，书里没有理论性的数学运算，它是供外行读者们读来消遣的。
In fact, he's written a serious treatise about the craft of prediction-without academic mathematics-cheerily aimed at lay readers.
据我们所知，还没有理论计算的影响，探讨了压力对该化合物的光学性质。因此，我们的工作是第一次尝试朝这个方向。
To our knowledge, there are no theoretical calculations exploring the influence of pressure on the optical properties for this compound. Hence our work is a first attempt in this direction.
他们没有理论总结，大多是一些情绪的释放，是社会道德文化转变的风向标，他们中的许多人走向极端，成为堕落一代。
They have theory summarize, some release of mood mostly social morals wind vane that culture changed , A lot of people of them move towards the extreme, become and degenerate a generation.
他们没有理论总结，大多是一些情绪的释放，是社会道德文化转变的风向标，他们中的许多人走向极端，成为堕落一代。
They have theory summarize, some release of mood mostly social morals wind vane that culture changed , A lot of people of them move towards the extreme, become and degenerate a generation.
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