It is a difficulty to obtain satisfactory solution based on a single structure and mechanism generally.
单一结构和机制的算法一般难以得到满意的解。
It is usually difficulty to obtain film coefficients between the working roll and the coolant fluid as we solve the temperature field of the roll.
工作辊与冷却液之间对流换热系数的确定是轧辊温度场分析的难点。
It is very difficulty to obtain the structural analysis correctly by the conventional boundary element method, when the boundary conditions is not given enough.
结构体的边界条件未能充分给出的情况下，用常规边界元法很难作出正确的结构分析。
The method based on workpiece surface images either cannot be used for online inspection because of the difficulty to obtain images in high speed circumrotating of workpieces.
基于工件表面图像的视觉监测方法，由于工件的高速旋转时，难以获取工件表面的清晰图像，也不宜用于切削过程监测。
The changes to the rating requirements for these items reflect the nature of the items, their power, and the relative difficulty that should be had when attempting to obtain them.
这些变化将会反映这些装备的本质，他们的能力，和获取这些装备的难易程度。
For using diesel-methanol emulsification fuel, one of the most difficulty things is how to obtain stable and cheap diesel-methanol emulsification.
柴油机中掺烧醇的最大难点之一在于难以获得价廉、稳定的柴油甲醇乳化燃料。
With the difficulty of measuring relative velocity considered, a relative orbit design method is proposed to obtain diverse relative orbits with only position feedback.
为了得到更丰富的相对轨道，同时考虑到相对速度测量困难，研究了仅利用位置反馈进行相对轨道设计的方法。
Landless peasants were unemployed, because of no living guarantee, they had to obtain employment, but their employment rate is not high and employment difficulty.
农民失地即失业，由于没有了生活保障，他们不得不重新就业，然而他们的就业率不高，就业困难重重。
They started lips death and teeth cold, have lost the security sense, thought not only own finance not to be able to obtain the safeguard, family member's safety also with difficulty safeguards.
他们开始唇亡齿寒，失去了安全感，觉得不但自己财务不能得到保障，家庭成员的安全也难以保障。
In the process of enterprises' marketing, to obtain the repayment of debts has become a great difficulty.
在企业销售过程中，讨债成为企业一大难题。
In the process of enterprises' marketing, to obtain the repayment of debts has become a great difficulty.
在企业销售过程中，讨债成为企业一大难题。
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