Especially when the time path is a highly non-linear, the polynomial rules become very complex and difficult to operate.
特别是当时间路径为高度非线性时，多项式法则变得很复杂且很难操作。
From the outset, the machine had been difficult to operate and after several accidents, it was decided to modify and simplify the controls.
机器一开始就很难操作。发生几起事故后，决定要修改并简化操纵装置。
The traditional image edge detectors can only get multiple-pixel-wide edges usually, thus it is difficult to operate by post-processing methods.
传统的图像边缘检测算子一般都只能得到多像素宽边缘，这为后续的图像处理带来了一定困难。
String puppets are also called marionettes. a marionette may have dozens of strings attached to different joints of its body, so it is difficult to operate.
提线木偶也叫活动木偶，它的关节上系有许多线，非常难以操纵。
It is very difficult to tap inside Aluminum matrix composites. The process is difficult to operate due to its close condition, and the tap is subject to breaking.
铝基复合材料内螺纹攻丝属封闭切削，加工难度大，丝锥极易折断。
Further more, as CRM is a complicated system, it is difficult to operate and to evaluate the effect. These questions need to be further studied and discussed in practice.
另外，客户关系管理本身是一个庞大复杂的系统，实施起来有一定的难度，评价其效果也比较困难，这些问题都仍有待在实践中进一步地研究与探讨。
The M3 Lee and Grant tanks, mounting a 75mm fixed gun, had a high silhouette and was difficult to operate in combat with the heavy German PZKPFW Mark IV and Tiger panzers.
M3‘李’式和‘格兰特’式坦克，装备有75毫米固定主炮，有高大的侧面轮廓，在战斗行动中难以与德国重型的‘马克’IV型坦克和虎式坦克相匹敌。
In the process of the introduction of classical problem based learning, the combination of PBL teaching method and current teaching method was found to be abstract and difficult to operate.
将国外经典PBL教学模式引入临床教学过程中，发现经典PBL教学模式与目前教学模式结合起来时存在抽象、操控难度大等问题。
Further more, as the application of CRM is a complicated system, it is difficult to operate and to evaluate the effect. These questions need to be further studied and discussed in practice.
另外，CRM的实施本身是一个庞大复杂的系统工程，实施起来有一定的难度，评价其效果也比较困难，这些问题都仍有待在实践中进一步地研究与探讨。
Further more, as the application of CRM is a complicated system, it is difficult to operate and to evaluate the effect. These questions need to be further studied and discussed in practice.
另外，CRM的实施本身是一个庞大复杂的系统工程，实施起来有一定的难度，评价其效果也比较困难，这些问题都仍有待在实践中进一步地研究与探讨。
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