Notes josh lerner , a harvard university economist who testified at the hearings : “ it ' s hard not to underestimate how difficult it has been to formulate policy in this area 也出席了公听会作证的哈佛大学经济学者勒纳指出：想要在这个领域里制定政策，很容易就会低估了其中的困难度。
We chose owl monkeys because their motor cortical areas are located on the surface of their smooth brain , a configuration that minimizes the surgical difficulty of implanting microwire arrays 我们会选择夜猴来做实验，是因为这种动物的运动皮质区位于其光滑大脑的表层；这样的结构，使得植入微细金属丝阵列所需的手术困难度减至最低。
Our results found institute and administrative factors , especially short of education manpower , were the major problem resulting in education difficulties . " global budget payment system " and " diabetic case management " add some difficulties on diabetes education 总额给付及糖尿病个案管理对卫教工作只有少许的影响，其中以门诊的护理人员卫教困难度变大为主。
For a child who easily gives up or becomes easily frustrated , parents can perform activities together with him such as puzzles and provide him with the appropriate support and encouragement to keep trying 对坚持度过低、遇到挫折容易放弃的孩子，家长可陪孩子做一些如拼图等具困难度的活动，过程中给予适当的协助，在孩子完成时给予赞美，藉此提升孩子持续尝试的动机。
Nonetheless , there are still a few concerns regarding this move toward digital technology ? what are its advantages over analog closed - circuit television ( cctv ) , how difficult is it to install and maintain , and how can companies cost - effectively migrate from analog to digital technology 然而，向数字技术转变中有些需要考虑的东西- - -它本身和传统安防系统的优势，安装和维护的困难度，安防企业在转变过程中如何有效的进行集成。
Under this circumstances , we discussed the principles of fitness landscapes of gas , and analyzed the ga - hardness based on fitness landscapes . furthermore , we proposed several methods to measure ga - hardness , or to solve some difficult problems for gas 本文就是在这种背景下，对遗传算法适应值曲面理论进行了探讨，并基于适应值曲面对遗传算法的困难度进行了分析，提出了若干种测试遗传算法困难度及解决遗传算法困难问题的方法。
Currently , the high volatilities in crude and product prices , low margin and high investments for increased product quality and environmental control standard , high customer expectation and fierce market competition make the downstream operation more challenging than ever before 最近，原油和石油产品价格的动荡，由于提高产品品质和环保标准引发低利润和高投资问题，更由于顾客期望提高和市场竞争加剧更增加炼油业营运的挑战性和困难度。
On the operation risk , invests the threshold and the operation degree of difficulty looked that , the use fund investment way , grasps the tendency which the future original material , the energy will continue rises , even the relative vicarious energy investment sign also will receive investor ' s attention , all will be the relative better choice 就操作风险、投资门槛及操作困难度来看，利用基金投资的方式，掌握未来原物料、能源续涨的趋势，甚至相对替代性能源的投资标的亦受到投资者的关注，皆是相对较佳的选择。
Since algeria has no official diplomatic relationship with formosa , delivering , transporting , and gaining customs clearance for the materials posed great difficulties . fortunately , however , the wholehearted assistance of european fellow initiates , the international red cross , and consul general abdiche made it possible for this transoceanic relief operation to be speedily accomplished 由于阿尔及利亚与福尔摩沙素无邦交，加深了救援物资在运输接驳和通关的困难度，幸而在世界会欧洲同修国际红十字会及阿尔及利亚驻法国总领事阿博帝赫先生的全力协助下，这场跨洋赈灾活动才得以在最短时间内圆满达成。
