难

There is so little we can do to ease your pain and anguish.

我们很难做些可以减少你痛苦的事情。

Using the numerical methods, the effects of the rotating angular frequency and oil film characteristic parameters on rub-impacts of rotor systems are studied.

但由于对油膜力的研究同样处在不成熟阶段，并且模型也比较复杂，很难对它进行理论分析。

To use respectively that rigid body plane differential equations of motion, theorem of angular momentum, conservation law of mechanical energy , and the law of conservation of energy.

分别采用刚体平面运动微分方程、动量矩定理、机械能守恒定律以及能量法，对拟定的半圆柱体微振问题进行分析求解，并作以比较，明确了从不同角度入手分析解决微振动问题所需基础知识和基本理论以及相对难易程

The properties of anhydrite Ⅱ with white protland cement as accelerating agent are studied,and the durable stucco gypsum in outdoor condition are prepared successfully.

研究白水泥等作激发剂的难溶性无水石膏的性能，并制备出用于室外条件下的耐久型粉刷石膏。

And the pigs had great difficulty in making them see that this was contrary to the spirit of Animalism.

而且那些猪很难让他们明白这和动物主义的精神是相悖的。

If you don't have a lot of experience modeling, however, it can be difficult to create a character you'll be happy spending much time animating.

如果你没有很多的经验模型，但是，它可能很难创造一个人物你是幸福的花太多的时间动画。

To understand the thermodynamic process of the transesterification, the thermodynamic properties (△r H o,△r S o,△r G o, K p ) of the reaction for production of DPC and anisole from 373 K to 473 K was calculated by using Material Studio and ChemCAD software as well as Benson and Joback group contribution methods.

DMC与苯酚酯交换合成DPC反应热力学方面的研究报道很少，散见于一些工艺设计专利中，且都未对数据来源做详细介绍，很难对数据的可靠性进行验证。

Landing at Annapolis would be easy. Getting to the capital would not.

在安纳波利斯登陆很容易，但要到达首都却很难。

Because harden steel be difficult to machine. but when anneal , It can be easily machine .

因为淬火后的钢很难进行加工，但退火后则很容易加工。

The aluminum groove used for heat dissipation is extrusion molding by 6030 aluminum ,and through anodize precessing technic ,with scientific struction for heat dissipation design ,which can solve the problem of heat dissipation efficiently , and can longer the life-span of LEDs , In addition ,the driver power utilize constant current IC driver ,which can asure the precise of power output and the stability during the couse of using .

散热铝槽采用6063铝挤出成型，经过阳极氧化等加工工艺处理，加上科学的散热结构设计，有效解决灯管散热难的问题，大大提高 LED 使用寿命。驱动电源采用恒流 IC 驱动方案，电流输出的精度高，确保 LED 使用的稳定性。

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。