It is often very difficult to distinguish between the two.
这两者时常很难去区分。
It has, until recently, been very difficult to distinguish between the two.
直到最近以前，要区别开这两者是非常困难的。
Therefore, it is very difficult to distinguish oil with water layer and to evaluate oil layer by using logging data.
采用人工神经网络测井识别技术识别油层并进行储层物性及含油性的解释。
The logo is so small that it is hardly recognizable, and the featured websites can be very difficult to distinguish from one another at times.
上面的logo太小以至于难以辨认，特色站点也难以同彼此区分开来。
Neurogenic claudication is pain in the legs due to compression of nerves in the spinal cord and can be very difficult to distinguish from claudication due to arterial problems.
神经性跛行是因为脊髓中的神经受到压迫导致腿部疼痛，这种跛行与因动脉问题导致的跛行是很难区分的。
In Bawu gas field, Shiwu fault, Songliao Basin, because the mineralization degree is low, it is very difficult to distinguish between gas layers and water layers by resistivity logs.
八屋气田储气层为层状低渗透致密储层 ，动用难度较大 ，压裂改造是动用八屋气田深部储量的重要手段之一。
Designing algorithms to distinguish originals among many very similar records is difficult, and almost certainly requires frequent human intervention.
设计出能区分很多相似记录中不同作品来源的算法是很困难的，而且几乎肯定会需要频繁的人为介入。
The lymphoid tissue color pathological images are very complicated, and the different images are very similar in vision, so it is difficult to distinguish them by naked eye.
淋巴组织病理图像极为复杂，不同类型淋巴组织病理图像视觉差异不大，仅靠传统的肉眼观察和主观判断很难立刻做出正确的诊断。
It is very difficult to forecast the thin and narrow sandstone of fluvial facies because of the limit of seismic distinguish ment.
受到地震分辨率的限制，河流相薄而窄的砂体展布很难预测。
It is very difficult to accurately distinguish the fluid property by means of conventional well-logging data.
用常规测井资料在该区难以准确识别储层流体性质。
It is very difficult to accurately distinguish the fluid property by means of conventional well-logging data.
用常规测井资料在该区难以准确识别储层流体性质。
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