无法研究的

Epidemiologist s counter that such small studies don't mirror real-world conditions, and they can't examine the long-term risk of disease.

流行病学家反驳说，这样的小规模研究不能反映现实世界的情况，也无法衡量出患病的长期风险。

The process of how human species developed from Homo erectus to modern man cannot be followed.

从古人类到现代人的后来的发展过程无法进行详细的追踪研究。

The experientialism began its renaissance in the 1980's and made considerable progress in the statistical language modeling research.

这种基于符号模型的研究方法具有语言学解释上的直观性，然而一直无法摆脱知识瓶颈问题的困扰。

However, risk is in the middle of the commercial bank behavior research but did not get the full and accurate reflection always, so can't reveal the behavior of the commercial bank fittingly.

然而，风险在商业银行行为研究当中却始终没有得到充分的、准确的反映，所以无法恰当地揭示商业银行的行为。

Due to the difficulty of direct measurement of collision force between small particles, an indirect approach to the measurement by applying PTV technology is developed. The visualized fluidize bed based on microphotography and sheet light source is set up to extend the above approach to practical usage.

针对微细颗粒间微小碰撞力无法直接测量的困难，本文发展出一种基于PTV可视化技术的碰撞力间接测量新方法，同时检验了以上理论成果，并进一步开发了显微摄像和普通光片光源以适用于实际流化床内的碰撞规律研究。

Neurobehavioral function was evaluated before the study and at 1, 2 and 22 hours after stroke using a four-point scale:(1) no deficit,(2) forelimb weakness,(3) inability to bear weight on the affected side,(4) no spontaneous motor activity.

神经行为功能进行了评估前的研究和1，2和22小时中风后使用了四点规模：（ 1 ）没有赤字，（ 2 ）前肢疲软，（ 3 ）无法承受重量的影响方面，（ 4 ）没有自发的运动。

As well-studied as dinosaurs have been over the past couple of centuries, paleontologists have learned little about their breathing, because lungs do not fossilize.

尽管过去的几个世纪里，我们对恐龙类有比较深入的研究，可是古生物学家仍对它们的呼吸状态知之甚少，因为肺无法形成化石保存至今。

Because of rigorous theory is lack, method that metal plastic stream is supposed through geometric proportion condensation, makes that cell quantity of the partition complex special-shaped product and disperse dots of die surface are many, reduce regression precision of streamline die design, sometimes can't be built mathematics module and its optimization.

由于缺乏严密的理论支持，仍假设金属流动按等比压缩方式研究，致使复杂拔挤异型材划分等比率单元过细及描述模腔曲面的离散点过多，降低了流线模设计的回归精度，甚至无法建立模腔数学模型及其优化。

Combined with the investigation of SEM and other methods of interface analysis, we found that in the impact fracture process, matrix deformation, fiber pull out, interface debonding between matrix and fiber, interface friction induced by debonding, new surface appearance and so on all can absorb impact energy.

此外，研究还发现G系列坯料即使烧结至1500℃，在熔剂的配入量达不到50%情况下无法烧结，这一试验结果能用颗粒体随机堆积气孔率和本文提出的聚合体颗粒堆积的分数维结构模型得到解释。

The models of intelligent systems are often imprecise and difficult to build with the conventional control methods.

智能系统的研究对象通常存在严重的不确定性，用常规方法无法建立其精确的模型。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。