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The work of restart up will become very difficulty, and even the line is blocked as the temperature drop to condensation point.

当存油温度降到一定程度时，管道再启动工作就会变得十分困难，甚至发生凝管事故。

If you have difficulty unrolling the condom, you might have put it on the wrong way.

如果你不能向下卷开避孕套的话，你佩戴的方式很可能是不正确的。

Mr. Xu of referral center of psychology of school of cent of prosperous of great connecting with the boxing skill also expresses Hua Ke, with classmate teacher confabulate sometimes more effectively help undergraduate solves psychological problem, had the difficulty that is hard to handle quite when the student especially when, the guidance with teacher correct major more it is important to show.

华科大武昌分校心理咨询中心的徐老师也表示，和同学老师谈心有时更能有效地帮助大学生解决心理问题，非凡是当学生有了比较难于处理的困难时，老师专业正确的指导更显重要。

S tendency to confabulation doesn't vary with the difficulty of memory retrieval, it undermines the idea that it's inherently a memory retrieval problem.

虚构的趋势不会随记忆提取的难度而改变，这就减弱了它是记忆提取的问题的说法。

The second difficulty comes from the confliction between private interests of politicians and public interests of the people.

导致代理失灵的第二个困难，是来自政客私人利益与人民公共利益之间的冲突。

With the application of Partial Least Square technique and the input need of only 2-D molecular structure, it overcomes the difficulty of conformer alignment for 3D-QSAR techniques and avoids the multiple collinearity for traditional Multiple Linear Regression.

本文应用基于分子全息的QSAR技术研究了联苯以及209种氯代同系物的水溶解度、正辛醇水分配系数、总分子表面积、水活度系数和亨利常数等5种与生物累积性有关的理化性质以及气相色谱相对保留时间，建立了一批具有高度预测性的QSAR模型。

I was confront ed with a difficulty.

我碰到了困难。

During the ordinary work, I live in the company for a long time, therefore I by mine everybody primarily, I have used to like family's heart working, with likes family's heart living, regardless of being the life, works, I must face, has the difficulty frequently, has the question, is puzzled has the confusedness.

在平常的工作中，我长期住公司里，所以我一直以我的大家为主，我用爱家的心去工作，用爱家的心去生活，无论是生活，还是工作，我要面对的，常常有困难，有问题，间惑有迷茫。

It is extremely difficult to solve the problem of tunnel leak, because there are many muddiness, greasy dirts and slushes on the top of the tunnel, thereby it is hard to conglutinate the waterproof materials. Test results show that the impervious pressure and the splice strength of the acrylic acid waterproof material will be up to 1.2 MPa and 1.8 MPa in 30 min with new formula and unique construction craft 50 that reduce the difficulty of conglutination.

实验结果表明：使用新型丙烯酸防水材料配方和施工工艺，使丙烯酸防水材料的抗渗压和粘结强度在30 min里能够迅速分别达到1.2 MPa和1.8 MPa，从而降低粘结难度，很好地解决了既有隧道的顶部因有很多的淤泥、油污、水垢等杂物而使普通防水材料难以粘结的问题。

Parametric evaluation function can condense the complicated multi-objective and multi-constrait problem into a single-objective unconstrained problem, then solved with conjugate gradient method.The parametric evaluation function method decreases the optimization difficulty,and makes the solution away from the boundary of feasible region during the optimization process,which makes all the objectives optimized simultaneously.

参数评价函数把复杂的多目标多约束优化问题转化为单目标无约束问题，然后用共轭梯度法进行求解，不但降低了求解难度，而且使得在优化过程中其解远离可行域的边界，保证了对多目标中所有目标同时进行优化。

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％。