With such a long interval, it is difficult to determine the age of this fossil.
时间隔得这么久了，很难确定这化石的年代。
But it is difficult to determine what gentile name was borne by married women.
但是，确定已婚妇女的血族名称却成了一种困难。
It is difficult to determine from an interview whether someone is type a or not.
面试很难区分出某个人到底属于A类还是B类。
It is difficult to determine actual time allotment for individual teaching session.
对于每次授课的时间分配上是很难决定的。
It is difficult to determine malignancy in endocrine neoplasms based upon cytology alone.
仅从内分泌肿瘤的细胞学检查很难确定为恶性。
It is difficult to determine which context an assembly has been loaded into without this MDA.
如果不使用此MDA，则很难确定程序集加载到了哪个上下文中。
With zinc, there is so little research that it is difficult to determine zinc's effect on a cold.
目前针对锌片预防感冒效果的研究寥寥无几，以至于很难判定其是否有效。
It is difficult to determine exactly an geometrical value of coma aberration by method of star-testing.
直接用星点法不易准确测定慧差的几何值。
"It is difficult to determine how long today's globalization dynamic will take to play out," writes Greenspan.
格林斯潘在书中写道：“很难确定当今全球化的活力还能维持多久。”
Hypertension is very common, especially in elderly patients. It is difficult to determine its exact incidence.
高血压很常见，尤其是老人，所以，确切的发病率较难确定。
If you change the process, it is difficult to determine all of the places in the document that need to be updated.
如果更改流程，则很难确定文档中需要更新的所有位置。
But on the condition of receiving little fluid sample in testing string, it is difficult to determine fluid property.
但对于测试时管柱回收到的流体量少的情况，很难准确判断其流体性质。
If it is difficult to determine who undertakes a bigger liability, they shall undertake the liability for compensation evenly.
难以确定责任大小的，平均承担赔偿责任。
The problem is that, in practice, it is difficult to determine what the correct gbean attributes are and if they are manageable.
问题在于，在实际操作中很难确定哪些是正确的gbean属性以及它们是否是可管理的。
Usually it is difficult to determine the coefficient of saturation recovery for nonequilibrium transportation of suspended load.
悬移质不平衡输沙研究中，往往有一重要参数即恢复饱和系数难以确定。
Simply field operations personnel experience knowledge, so it is difficult to determine the model of complex systems to effective control.
只需现场操作人员的经验知识，使模型难以确定的复杂系统得以有效的控制。
At times it is difficult to determine what exactly is the difference between contemporary culture and the arts and literature of the past.
有些时候，人们难以确定当代文化与过去的艺术和文学的差异究竟何在。
The results show that the difference is very large, and it is difficult to determine which method is suitable for the liquefaction estimation.
结果表明，现有的以剪切波速为指标的各液化判别方法的判别结果之间的差别很大，尚难把握采用哪个液化判别方法是适宜的。
"It is difficult to determine if patients who report less pain are responding to these treatments or just getting better on their own," he says.
“这是很难判断谁报告患者痛苦少，是应对这些治疗或刚开始对自己更好，”他说。
It is difficult to determine the membership function in fuzzy optimization method and to obtain the knowledge, experience and rules in expert system.
模糊优化算法中隶属函数的确定及专家系统中专家的知识、经验和规则的获取都是棘手的问题。
It is difficult to determine exactly which organic compounds are present in the aquarium and what specific effects they might have on different organisms.
这是很难准确地确定有机化合物是目前在水族馆和，他们可能有不同的生物体什么具体的影响。
It is difficult to determine the geological structure character and rock masses 'character, which makes the design and construction of the tunnel slope difficult.
由于隧道仰坡地质的结构特征、岩体的性质很难事先准确判定，因而给隧道仰坡的设计和施工方法的确定带来一定的困难。
People really know few about the "cold violence", and it is difficult to determine whether a certain behavior constituted the "cold violence" and the hurt level of it.
人们对“冷暴力”知之甚少，对于某种行为是否构成“冷暴力”的伤害及其程度更是难以判定。
If it is difficult to determine the actual losses, the actual losses may be determined on the basis of the gains which the infringer has obtained from the infringement.
实际损失难以确定的，可以按照侵权人因侵权所获得的利益确定。
Generally, it is difficult to determine in advance a suitable network structure when a multi layer perceptron neural networks is used for a special fault diagnosis problem.
一般对特定的基于多层感知器的故障诊断问题，很难确定神经网络的结构。
Generally, it is difficult to determine in advance a suitable network structure when a multi layer perceptron neural networks is used for a special fault diagnosis problem.
一般对特定的基于多层感知器的故障诊断问题，很难确定神经网络的结构。
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