The company considers that the outcome of a contract cannot be estimated reliably until a contract is 25% complete.
该公司认为，一个合同的结果不能可靠估计的，直到合同完成了25%。
Moreover, as class density estimates cannot be derived for such a training set, class posterior probabilities cannot be estimated.
更进一步地，因种类分布密度无法从那样的训练集中进行估计，种类的后验概率也无法被估计出来。
If two vanishing points are not available, focal length cannot be estimated automatically and must be entered manually before the lens model can be solved.
如果两个消失点并不可用，焦距不能估计自动和手动输入必须在透镜模型可以解决。
Because the system equation is changed with time, during the measurement, the statistic character of the system noise and the observation noise cannot be estimated or be determined accurately.
由于系统方程是时变的，在测量过程中，系统噪声和观测噪声的统计特性等很难精确地估计或测定，事实上很多误差模型都不能简单的设为白噪声。
We cannot measure pain directly. It can only be estimated.
我们无法直接测量疼痛的程度，只能估计。
The loss of life cannot be reliably estimated at present, but is at least 50,000 and rising.
目前，尚不能对失去的生命作出可靠估计，但这个数字至少为5万，并且有增多之势。
On the other hand, competition is absolutely destructive for children and the psychological damage cannot be over-estimated.
另一方面，竞争对于孩子们来说是破坏性的，而且会形成难以弥补的心理上的创伤。
Estimated by the reservoir model, the shoal can be recovered but cannot returned to the original scale.
利用水库模型估算，浅滩在短期内难以恢复到原来的规模。
It is believed that a light earthquake unearthed the cave which is estimated to be over 10 million years old, but scientists cannot explain the intense glow of green lights emitting from its depths.
据认为，鉴于地震出土的工程，预计将超过10亿年的历史洞窟，但科学家无法解释从深处冒出绿灯强烈的光芒。
The economical and industrial importance of the union of coal and iron(2) in the British Isles cannot be over-estimated.
对于英国，煤炭和钢铁加在一起对其经济和工业的重要性怎么强调也不过分。
The economical and industrial importance of the union of coal and iron(2) in the British Isles cannot be over-estimated.
对于英国，煤炭和钢铁加在一起对其经济和工业的重要性怎么强调也不过分。
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