难

Defended by an army of 6,000 men the city was difficult to take.

有一支6000人的部队守卫，这座城市很难攻下来。

Rice stalking or branch: As to the United States and European market, I predict when they can anabiosis very hard.

柯瑞斯：至于美国和欧洲市场，我很难预计它们什么时候会复苏。

The only way to improve the function of your heart and lungs is to push them harder than normal, into the anaerobic side of things.

只有这样，才能改善的功能，您的心脏和肺部是推动它们更难比正常，进入厌氧方面的事情。

The hardware consists of industrial personal computer, temperature data collecting module, analog output card and thermocouples. With Visual Basic6.0 as a development platform, the software is based on control algorithm.

其温度控制通常是通过高频加热设备上的手动旋钮调节输出功率，从而控制温度，这样很难达到精确控制试验样品的升降温速度和进行恒温控制，本文设计一套高频感应加热设备温度控制系统，控制界面友好，可以直接在计算机上设定高频感应加热设备的温度变化曲线。

This has always been difficult with analog recording.

这个在模拟录音中总是很难达到的。

It is difficult to account for these analogies.

这是很难考虑到这些类比。

My physics teacher often use analogies to illustrate a number Of difficult to understand the concept.

我的物理老师经常使用类比来说明一些较难理解的概念。

We are working and analysing things but it is not easy.

我们会努力工作分析，但这样还是很难啊。

It is difficult to build an analytic expression that includes all the factors to describe the heat flow in electrical apparatus.

电器各部分的发热与散热是一个非常复杂的过程，影响它的因素很多，很难建立一个考虑到所有影响因素的热过程解析公式。

It is difficult to get the accurate analytic expression dependent on temperature and wavelength through theoretical derivation,because phase transition mechanism is complex.

因为相变机制的复杂性，很难从理论上推导出相变前后光学常数随波长和温度变化的解析表达式。

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。