问题是

It is one of the hottest problems of the profession development of teachers across the world.

教师专业发展问题是当今世界范围教育改革中的热点问题之一。

As we all know, thermochemistry is the direct application of thermodynamic in the field of chemistry.

近年来，纳米结构材料引起人们极大的兴趣，对这些由有限个原子构成的小颗粒，再由这些小颗粒凝聚而成的纳米结构材料在热化学方面有什么新的特点，它与颗粒尺寸的关系和粗晶、多晶材料所遵循的规律是否一致，已成功描述粗晶和多晶热力学行为的经典热力学理论对纳米材料是否还适用，这些问题是纳米材料的深入研究和推广应用所必须解决的关键问题。

While I certainly want you to be safe from malicious security crackers and vandals for your own sake, that's really only a secondary concern for me. My primary concern is simple, and selfish

尽管我确实想让你们为了自己的利益而避免恶意安全侵入者们和破坏者，但这对我而言真的只是次要问题，我的首要问题是简单，和自私的

This question goes to the core of the quality of your relationship.

这个问题反映的核心问题是你们的关系的质量。

In fact, they ask this to know how you respond toa difficult question.

事实上，他问这个问题是看你对棘手问题的反应。

A key problem in the management of toll road is a problem of solving the flow of vehicle.

收费道路管理中的一个关键问题是解决车辆流量的问题。

The algorithm of small target detection based on morphology Top-Hat is given.

引 言众所周知，红外弱小目标的检测问题是精确制导、光电子领域中的一个重要问题。

The traffic problem is one of the main problems of city.

交通问题是城市的一个主要问题。

The traffic problem is one of the main problem of the city.

交通问题是城市的一个主要问题。

Traffic is the key problem of a city.

交通问题是城市的一个主要问题。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。