Gully and slope land in towns are relatively difficult to develop and protect.
城镇内部冲沟坡地是开发和保护难度都较大的区域。
One habit that is very difficult to develop is finding the time to read every day.
每天抽空阅读是一个很难培养的习惯。
It is considered that it is difficult to develop a program, but easy to test a program.
人们常常以为，开发一个程序是困难的，测试一个程序则比较容易。
Obesity drugs have proved difficult to develop, and only a few have entered the marketplace.
事实已经证明很难开发减肥药，只有少量药物进入市场。
For developers who have Web application experience, it's not difficult to develop multimodal applications.
对于具有Web应用开发经验的开发者来说，开发多模式应用系统并不是一件困难的事情。
Because these concerns are not easily separated, the solution can be difficult to develop and maintain.
因为这些方面不容易剥离出来，所以这种解决方案很难开发和维护。
It is very difficult to develop the deep thin reservoirs using the conventional horizontal drilling technology.
利用常规水平井技术开发深部薄油层有较高的技术难度。
Prof. Jensen : I think it is difficult to develop global guidelines for hepatitis C treatment for several reasons.
我认为很难制定全球丙肝治疗指南，原因有几个。
It is difficult to develop the small fault-block reservoir for its complicated geologic conditions in Machang Oilfield.
马厂油田是一个地质条件较为复杂的小断块油田，开采难度大。
But a full DSL approach could be difficult to develop in a large group with several business units that are distinct from each other.
然而，如果一个较大的组织中存在几个截然不同的业务单元时，整套DSL方法开发起来还是比较困难的。
Diagrams are crucial, since without them, it is difficult to develop an understanding of the model and, hence, the system it represents.
图是决定性的，因为没有它们，理解模型是很困难的，因此理解模型代表的系统也是很困难的。
As more flat file inbound flows are added to the solution, the code base becomes unnecessarily large and difficult to develop and maintain.
随着向解决方案添加越来越多的平面文件入站流，代码库会变得过于庞大，难于进行开发和维护。
The hydropower and mineral resource is abundant in Yunnan province, but it's difficult to develop because it located in the earthquake-prone areas.
云南省水电、矿藏资源丰富，但地处地震多发区，给资源开发带来一定难度。
Over the years of n-tiered architecture, it became evident that it was difficult to develop applications that give the end user a rich experience with a browser.
在n-tiered体系结构的这几年来，很明显开发给予终端用户丰富的使用浏览器方面经验的应用程序比较困难。
The oil reservoirs in Pingbei Area of Ansai Oilfield is difficult to develop because of its ultra-low permeability, micro-fracture, and low production of oil wells.
安塞油田坪北区油层渗透率特低，具有微裂缝，油井产量低等特点，为此，增加了油藏开发中的难度；
Many specifications are involved with PCI bus and interface explanation is complicated, so its difficult to develop the stable PCI bus equipment of high performance.
PCI总线涉及的规范比较多，接口说明复杂，开发出高效、稳定的PCI总线设备具有一定难度。
Comparing with large city public libraries, the county public library is weak and small, it is difficult to develop for a great shortage of outlay and talented people.
县级市公共图书馆相对于大城市公共图书馆来说，可以称得上是“弱势群体”，它们由于经费不足、人才匮乏等原因，经常处于“巧妇难为无米之炊”的境地。
However, in the actual researching project, arranging course is a NP problem. which is difficult to develop a good arranging course system to meet the requirements of users.
然而，在实际项目的研发中，由于排课问题是一个NP完全问题，开发出符合要求的排课系统是一件难事。
This fragmentation has made it difficult to share data between cultures and even more difficult to develop world-ready applications that support a multilingual user interface.
这个分散片段会使得在文化特性之间分享资料变得很困难，甚至会使得开发世界性和支援多语系使用者介面应用程序更为困难。
Because its occurring conditions, factors and mechanism are variable and complex, it is very difficult to develop a precise mathematical model to make the overall description.
由于污垢产生条件、影响因素及作用机理的复杂性，目前很难用一个数学模型对其进行准确的描述。
However, since the field knowledge of power system is characterized with a lot of experiential knowledge, it is a bit difficult to develop an expert system with study function.
然而，由于电力系统领域知识往往具有经验性知识较多的特点，所以开发具有学习功能的专家系统有一定难度。
These obstacles made it very difficult to develop large scale network applications, that is computer programs that could be used by lots of different people in lots of different places.
这些障碍严重妨碍了较大范围内不同地区的人群计算机使用上的网络化应用。
It is very difficult to develop an integrative MIS with properties of validity, transportability and correctness using the different hardware environment, OS and communication platform,.
在不同的硬件环境、操作系统以及通讯平台上开发具有正确性、可移植性、有效性等特征的集成MIS系统变得非常困难。
The hardware environment for the ASP software is already full-fledged at present. But it is still difficult to develop and publish such kind of software for most software developers in China.
国内运行ASP模式软件的硬件条件目前已基本成熟，但开发并发布一套完善的ASP模式软件对于国内大多数软件开发商而言，仍然存在一定的难度。
Moreover, child will HAs less time to play and communicate with theirs peers due to extra studies, consequently, it is difficult to develop and cultivate theirs character and interpersonal skills.
而且，由于要额外地温习，刚出生的孩子们么有多少时间和同龄的刚出生的孩子玩耍和沟通，很难培养她们的个性和交际能耐。
Moreover. consequently, children will have less time to play and communicate with their peers due to extra studies. it is difficult to develop and cultivate their character and interpersonal skills.
孩子们没有多少时间和同龄的孩子玩耍和交流，由于要额外地学习。很难培养他个性和交际能力。
Moreover, children will have less time to play and communicate with their peers due to extra studies, consequently, it is difficult to develop and cultivate their character and interpersonal skills.
而且，要额外地学习，孩子们多少和同龄的孩子玩耍和交流，很难培养的个性和交际能力。
Moreover, children will have less time to play and communicate with their peers due to extra studies, consequently, it is difficult to develop and cultivate their character and interpersonal skills.
而且，因为要额本地学习，孩子们没有几时间和同龄的孩子游玩和交流，很易培养他们的个性和寒暄能力。
Moreover, children will have less time to play and communicate with their peers due to extra studies, consequently, it is difficult to develop and cultivate their character and interpersonal skills.
而且，因为要额本地学习，孩子们没有几时间和同龄的孩子游玩和交流，很易培养他们的个性和寒暄能力。
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