向后的

Try and see inside you mind,a wide open blue sky and a vast green plain far away.Breathe in as you circle your hands high above you head,then bendback a little.Breathe out as you circle your arms back down to your sides...

试着去感觉你的思想深处，遥远的广阔蓝色天空和辽阔的绿色大草原，将你的双手举过你的头吸气，然后向后仰一点，将你的手臂收回在你的两侧再吐气。

The highway that he followed was open , and at a little distance dipped into a valley , across which it could be seen running from edge to edge . he had traversed the greater part of this depression , and was climbing the western acclivity , when , pausing for breath , he unconsciously looked back

他走的是一条宽阔的大路，前面不远，大路就进入一个山谷，从远处看去，大路从山谷的这一头到另一头穿谷而过，他把这段山谷中的道路走了一大半，然后走上了西边的山坡，在他停下来喘一口气的时候，无意间向后看了一眼。

An improved derivative estimation algorithm with a low-pass filter that can suppress the influence of high-frequency noise is suggested to remove potential drawbacks of the backward difference that was applied in neural network inversion dynamic compensation method, such as large estimation error in the presence of noise and price increase of hardware realization when high estimation accuracy is required.

针对神经网络逆动态补偿策略中基于向后差分的微分估计算法在噪声环境下存在较大的微分估计误差，且提高估计精度会增加硬件成本等缺陷，提出了改进的微分估计算法，并以加速度传感器为例，设计了动态补偿实验装置，给出了基于改进的微分估计算法的动态补偿算法的实现步骤。

The control volume integration was applied to deduce the discrete expressions of the convection-diffusion equations. The staggered grid and SIMPLE algorithm were introduced to deal with coupling between pressure and velocity, and then the numerical computation expressions of such variables as fluid flow velocity and pressure were deduced. Using the backward difference method and incremental theory to discretize the governing equations for fields of chemical reaction, material structure and chemorheology, the numerical computation expressions of variables such as the monomer conversion, average molecular weight and fluid viscosity were constructed.

应用控制容积积分法导出了对流—扩散方程的离散表达式，引入交错网格技术与SIMPLE算法，实现了耦合的压力场与速度场的分离式求解，推导得到了流体的流动速度、压力等物理量的数值计算式；采用向后差分方法和增量方法，实现了化学反应场、材料结构场、化学流变场控制方程的离散，获得了反应转化率、聚合物平均相对分子质量、流体黏度等物理量的数值计算式。

A policy paper published in February suggests allowing local authorities to benefit financially for agreeing to host new housing developments, with central government providing extra cash for six years after the new houses are built.

有意思的是保守党人也在对类似的主意感兴趣，特别是在房屋的问题上。2月份实行的一项政策允许地方政府从批准兴建的房屋中获得好处，中央政府在房屋建成后的6年里向地方政府提供额外的资金。

In this paper the dimension parameters which influence the electrical properties of the biconical antenna is discussed by means of simulation and experimental test. And a biconical omni-directional antenna array operating within 0.8~3GHz is designed. Its design parameters and the results of the simulation including curves of the VSWR, radiation pattern and the gain within the band are also given.

本文通过仿真与实验测试对影响双锥天线电性能的各种尺寸参数的作以探讨，并且设计了一种可工作于0.8～3GHz的宽带双圆锥全向天线阵，给出了该天线的具体结构尺寸以及仿真后的VSWR数据曲线，E面，H面辐射方向图和频段内各频点的增益值，以及此天线在0.8～3GHz范围内的VSWR测试数据曲线，并进一步提出了一些设计此类天线的关键点。

She screamed back, gibberish at first but mixing into curses and despondent wailing, and Key blackly thought that whoever had left the stainless steel tray with the polished-reflective surface within her reach was going to get both of his or her arms broken.

她向后地尖叫，乱语起先但是混合进入诅咒和丧气的悲叹之内，而且钥匙黑色地想任何人被有留下不袗盘子由於她的范围里面的擦亮-反射的表面将要被打破的他或她的手臂得到两者。

That fact was driven home again the other day when I watched A-Rod bust up the line in Dunedin after hitting a ground ball to the left side.

回到现实，有一天，我观看A-Rod在Dunedin的打击，在击向左侧的滚地球后，他使出吃奶的力气，使劲的往一垒跑，期望能比球早到，他失败了。

He looked to the south and knew that somewhere beyond those bleak hills lay the Great Bear Lake;also,he knew that in that direction the Arctic Circle cut its forbidding way across the Canadian Barrens.

他向南望去，知道大熊湖就在荒凉的群山后的某个地方，他还知道，在那个方向，北极圈的禁区线穿过加拿大的不毛之地。

Numerical examples show that the bounds porvide a convenient way of testing the structured backward stability of computed solutions to the linear system ATAx = b.

计算实例表明：这个被获得的ηs的上、下界，为检验线性方程组ATAx=b的计算解的结构向后稳定性，提供了一个简便的方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。