难达到

It is proposed to directly carry out the orthogonal expansion of the seismic displacement to capture main probbilistic characteristics of the seismic ground motion with only a few terms of the series.

考虑到直接对地震动加速度随机过程实施正交展开，很难达到以较少展开项数反映原随机过程的目的。

The sweeping method can obtain an accurate result as to membrane with lower permeance due to difficult to attain stabilizing state.

通过分析认为，对于低通量的膜，由于较难达到稳态，吹扫气法的测定较为准确。

It is also essential to consider the question of outlook from the various rooms ,and those most in use should preferably face south as possible .it is ,however ,often very difficult to meet the optimum requirements ,both on account of the surroundings and the location of the roads .in resolving these complex problems ,it is also necessary to follow the local town-planning regulations which are concerned with public amenities ,density of population ,height of buildings ,proportion of green space to dwellings ,building lines ,the general appearance of new properties in relation to the neighbourhood ,and so on .

此外，还必须考虑各种客房的朝向问题，当然最好尽可能的将那些经常使用的房间朝南设置。然而，在考虑到周围的环境和地点、道路等多方面因素，往往很难达到最佳要求。在解决这些复杂的问题，还必须按照当地城市规划条例所涉及的对公共设施，人口密度，建筑物高度，绿化面积，建筑红线等的要求，还要考虑到有相邻建筑的情况，等等。

When the liquid is cooled, the re-formation of the original solid requires a reorganization that is hard to achieve because of the difficulty the groups experience in moving.

当此熔融液体冷却时，想要重新组合成起始固体需要原子团重组，但这种重组很难达到，因为它们移动存在困难。

But the added capacitance spur track makes the control of the rectifier much more complex.

但是电容支路的引入，将使传统的控制策略很难达到优良的控制效果。

However,as the development of the society and economy,we gradually find that the implement of this stander can't achieve the goal any longer.

但随着经济的发展和时代的进步，我们越来越发现，采用这一标准已经很难达到有效的控污了。

Shelter ancient allowance not only performance poorer and what depend on a series of assume the condition is very inaccessible strictly, its suitable scope and performance are consequently suspectable.

庇古津贴不仅绩效较差而且所依赖的一系列严格的假定条件很难达到，因而其适用范围和绩效都值得怀疑。

If the flying bubble collides with left or right wall, it reflects symmetrically, allowing you to hit areas that may seem very difficult to reach.

如果飞行泡沫相撞的左边或右边墙，它反映了对称，让您受灾最严重的地区可能似乎很难达到。

Second, terrazzo wear-resisting, lasting, and designed a variety of complex patterns, which use a block of granite, marble is difficult to achieve.

二是水磨石耐磨、持久，并可设计成各种复杂的图案，而这一点用整块的花岗石、大理石则很难达到。

The analysis results showed that the strapdown approach will be faced to more error sources with sensor noise and motion disturbance. The simulation results verified this and indicated that the performance of the strapdown approach would not be as efficient as that of the direct approach.3. Analyzing the principle and error model of MEMS QRS gyro for the purpose of practical applications, the paper presented an autoregressive model for the gyro signal by means of time series theory.

应用牛顿力学原理分析了光电稳定跟踪机构的惯量耦合关系和动力学模型，推导了平台单轴伺服回路的控制方程，比较了直接稳定和捷联稳定方案在测量噪声和外部扰动共同作用下的性能特点，仿真结果表明，在同等噪声和扰动条件下，捷联稳定面临更多的误差源，因而最终的稳定精度较难达到直接稳定系统的水平。3。

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