难点

The control of the aging condition, the transient liquid- solid separation of aging slurries, and the analysis of the particle size distribution of CTA and the micro concentration determination of the impurity 4- CBA.

粗对苯二甲酸的高温熟化是一个复杂过程，动力学实验研究的难点在于3个方面，即反应条件的控制，熟化浆料在高温高压下的液固瞬间分离取样与样品的分析测试。

The node issues occurred in the design is that air valve and the transmission of gear.

设计中碰到的难点问题在于气阀设计，齿轮传动设计。

Research has been made on the airgun principle and its testing strategy, then we simulated the wavelets in both near field and far field of the airgun source on the Ziolkowski model basis, and the analysis on its energy and P/R at different depths is given.

本文针对滩浅海地震勘探的难点问题，特别是滩浅海地震资料信噪比、分辨率低，干扰严重的问题，在滩浅海地震勘探野外采集方面取得了较大进展。

Because risk factor and the project participant's complexity involved in one's own characteristic and allocation of risks, BOT project risk is become BOT difficult point.

由于BOT项目本身的特点及风险分担涉及的风险因素和项目参与方的复杂性，BOT项目风险的分担因此也成为BOT项目理论研究中的难点。

Chapter 3 inducts the requirements to be protected by the law and puts forward the views on copyright of the infringing imitation which is the difficult and ambiguous point existing in practice.

第三章"临摹作品的可著作权性：其他相关问题"归纳了作品受著作权法保护所应该满足的要件，并针对实践中存在的难点和模糊点——侵权临摹作品的著作权的认定问题提出了笔者自己的看法。

How to achieve high removal rate of ammonium is the emphasis to researchers.

如何有效地去除废水中的氨氮是水污染防治界研究的重点和难点之一。

The thought seems to be clear, but the function related to and strength amon

其中还涉及到镶块，思路看似清晰，但各种结构间的关系和力的作用是难点和重点。

Low power, low cost and noise free is a hot research on the field of analog-to-digital converter.

如何使模数转换器既拥有较强的抗干扰能力，同时达到低功耗的要求，越来越成为模拟集成电路研究的热点和难点。

The analogue method and FFT method, as the basic measurement techniques for distortion are discussed, the technique and the difficulties of distortion measurement is analyzed in detail.

叙述了正弦信号源失真的分类：谐波失真、噪声失真和杂波失真；讨论了失真测量的基本技术的优点和局限性，分析了失真测量技术的难点和技术状况；介绍了谐波失真和总失真度的定义。

A succinct analytic expression can not be obtained, when the reachability graph of the ASPN is very large.

由于ASPN的可达图很大时不能得到简洁的表达式，为克服这个难点，我们又提出了矩阵矩母函数方法。

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％。