难

Although things are unlikely to be placed as animmediate atemporal object to grasp in a changing world, the art as a visual form hasto scan the world by the way of image.

处在一种变化中的世界、万物是很难被作为一个置于眼前的非时间性的客体来进行把握的，但是作为一种视觉形式的艺术却不得不将世界以一种图像的方式确定下来。

Given that current GISs already have a hard time ensuring data integrity even in the standard, atemporal case, it is somewhat difficult to forecast whether they will soon be capable of handing data integrity in space-time cube models.

当前的 GIS 甚至在标准版的非时间研究案例中都难于得证时间数据的完整性，那么更加难预测何时能在时间立方模型中处理数据的完整性。

This issue is one of the difficult issues in the study of ATM networks.

这个问题在ATM研究中是比较难的问题之一。

Making favors even trickier to grasp -- and thus easier to game -- is research suggesting that the deed itself isn't as valued as much as the atmospherics around it.

研究表明，帮忙本身的价值不及围绕它的那种氛围重要，这让人情的价值更难把握，从而也更容易换得人家的回报。

Making favors even trickier to grasp -- and thus easier to game -- is research suggesting that the deed itself isnt as valued as much as the atmospherics around it.

研究表明，帮忙本身的价值不及围绕它的那种氛围重要，这让人情的价值更难把握，从而也更容易换得人家的回报。

Making favors even trickier to grasp --as much as the atmospherics around it. Someone's gender, their apparent willingness

研究表明，帮忙本身的价值不及围绕它的那种氛围重要，这让人情的价值更难把握，从而也更容易换得人家的回报。

With the development of science and technology, sensitive, rapid, reproducible, simple and accurate analytical methods are required for the determination of trace elements in geological, biological and environmental samples. The direct determination of extremely low concentration of trace element with modern atomic spectroscopic method, such as atomic absorption spectrometry is so difficult. On one hand, the limitations are associated not only with the insufficient sensitivity of these techniques but also with matrix interference.

随着科学技术技术的发展，在进行地质、环境、生物等样品中痕量金属元素的测定时，常常要求达到ppb级的水平，虽然火焰原子吸收分光光度法具有很高的灵敏度，但是要直接测定这些样品中的痕量组分却很难，这是因为，一方面，样品本身的物理化学状态有的不适合直接测定，或组分的含量低于分析方法的灵敏度；另一方面是存在基体干扰。

But with decreasing of atomic number, the quantity of calculation will go up tremendously. In order to solve that.

但由于原子数目和自由度的增加，会使计算量急剧上升，造成计算很难进行。

ABSTRACT The technique of melting refractory metal with electron beam is widely used in many fields, for example, vacuum coating, electron beam machine and AVLIS (atomic vapor laser isotope separation), etc.

电子枪加热熔化难熔金属技术在众多的领域中得到广泛的应用，例如真空镀膜、金属切割加工和激光原子法分离同位素（Atomic Vapor Laser IsotopeSeparation，缩写为AVLIS）等。

Through comprehensive analysis of various physiological indexes, theinitial conclusion was drawn out: Atriplex canescens cannot survive in the areawithout irrigation and or with scarce rainfall; the limitation scope of rainfall forAtriplex canescenss survival is under research; this species can only be extended inthe area with certain favorable rainfall.

通过对各项生理生态指标的综合分析初步得出如下结论：在没有灌溉和降雨量不大的干旱地区难易生存，至于四翅滨藜在降雨量多少毫米的范围内能够生存，还需要进一步的研究；在干旱沙区进行推广，必须有一定的灌溉条件。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。