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Pretilt angle is a key parameter for various nematic LCDs. Since it is difficult to measure the pretilt angle of the cell with non-zero twist angle, Usually regarded as same to that in antiparallel one.

2预倾角是制造各种向列液晶器件都需要控制的参数，由于很难测得扭曲盒中的预倾角，传统的方法认为它与均匀排列平行盒的相等。

With growth of ages, our arthrosis become ankylosis, and difficult to supple which is really a problem to the old.

随着年龄的增长，关节变得僵硬，不易弯曲。

Therefore, it is difficult to solve the polymer sulfur within the solution. The only method to avoid passivation of anode is removing the sulfur from anolyte.

因此，除了将高级多硫化物移出电解液，避免大颗粒的α型硫磺S〓的产生，在电解液内部解决阳极钝化的问题极其困难。

As a matter of fact, rupture and sustainability are, essentially, running in contrast to each other as "rupture" is based on the belief of anthropocentric interest, making its difficult to realize sustainable development.

因此近代推动永续发展成效不佳，其与西方主流生态思维的肇基文化是一种「断裂」的理念有著根源性的关联。

In the application of CNN to synchronous generator modeling, the training process convergence of network learning is difficult to control.

在应用混沌神经网络进行同步发电机的建模过程中，对于CNN的学习，网络训练过程的收敛性很难控制。

It is difficult to apply oneself to a boring task.

致力于厌烦的工作是非常困难的。

It's difficult to apply oneself to an uninteresting task.

要让自己完成一项无趣的任务是很难的。

Due to the lack of witnesses, it is difficult to apportion the blame for the accident right now

由于没有证人，一时很难分清这次事故的责任。

The petroleum of BoHai bay is a kind of high gluey, asphaltum and viscosity crude oil. Its emulsion is very difficult to be broke, only less than high pour point and heavy crude oil. And it is always a serious problem to choose several good kinds of demulsifiers in the oil gathering process of BoHai bay.

渤海地区海上原油的特点是属于高胶质沥青质环烷基稠油，其所形成的原油乳状液是比较难处理的原油乳状液，它的脱水难度仅次于高凝稠油，其针对性破乳剂的选择一直是困扰生产的主要问题。

It was difficult to get to know her because she always kept everyone at a distance.

很难了解她，因为她总是跟每个人保持着一定的距离。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。