难达到

With the higher requirement of the low energy lost of hydrocyclone, especially single-level hydrocyclone inaccessible separation standard, industrialization requirements are carried out by series-parallel connection of multilevel hydrocyclone. Thus, the utilization of uniflow hydrocyclone becomes more and more abroad when the hydrocyclone changes its role from primary ultimate separation equipment to advance separation equipment.

随着对水力旋流器低能耗提出更高的要求，特别是单靠一级水力旋流器很难达到分离标准，需要通过多级水力旋流器串并联来实现工业化要求，水力旋流器从原来的终极分离设备变为预分离设备，这种角色的转变是直流式水力旋流器的应用日渐增多的重要原因。

Inorganic Se could be transformed into organic Se after malt steeping, germinating and kilning, which not only satisfies human need but also keeps human being and animal from the overtaking of Se by malt.Malt was used as a carrier of Se, not only, for it's nutritious, edible and medicinal but also for it's useful in food industry, especially in brewing.

我们把麦芽作为富硒载体不仅因为麦芽营养价值高，而且兼有食用、药用、酿造用等多种用途，因而麦芽在食品工业中占有很重要的地位，特别是在酿造工业上，麦芽是酿制啤酒的主要原料。2001年我国啤酒产量达2200万吨，需麦芽300万吨，但由于国产啤麦制麦性能较差，麦芽的质量指标很难达到原轻工部部颁优级品的标准。

Segments of the river have been finding it difficult to meet the drinking water standard for nitrates.

一些河段已经很难达到饮用水的硝酸盐含量标准。

But such a device if it is not completely refurbished, so difficult to achieve.

但此类设备如果翻新不彻底，也难达到如此的精度要求。

Through the various belt conveyor tensioning device comparison and analysis tells us that according to the existing tension of all types of devices, it is difficult to achieve the best results of tension.

通过对带式输送机各种张紧装置的比较和分析后可知，按现有的各类张紧装置，很难达到最佳的张紧效果。

There are many kinds of air-borne equipments and the signals to be measured are complex, it is hard to attain the goal of fault diagnosis and isolation just use one method.

由于运八系列飞机上装备的机载设备种类比较多，测试信号复杂，单纯使用一种故障诊断方法很难达到故障诊断与隔离的目的。

H.264/AVC is the new generation of video coding protocol with a higher efficiency,but the by-effect is increasing the complexity of the protocol H.264 codec.Thereby it is difficult to achieve the real-time application.

论文摘要： H.264/AVC是新一代的视频压缩标准，编码的压缩率很高，但带来的副作用却是编解码器复杂度的增加，从而很难达到实时的要求。

This resulted in the present-day term "Shangri-la," which, like El Dorado, signifies an unattainable goal.

这产生了现在的术语&香格里拉&，它像El剑鱼，象征一个难达到的目标。

Chapter Four ascertains ambits of the Northwest China, analyzes resource and environment situations, and illuminates advantages and disadvantages of resource and environment in Northwest China.

同时，由于国内外环境条件的变化，西部开发不可能像东部一样在很短时间内(20年)取得大的成效，而且也很难达到东部开发所取得的效果。

Since sines and cosines have an unending series of non-zero differentials, steady hardly comes into it.

因为正弦和余弦有着一系列没有终点的非零级差，这很难达到稳定。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷