查询词典 difficult problem

Word sense disambiguation is a key problem and one of difficult points in natural language processing.

摘 要：词义消歧一直是自然语言处理领域的关键问题和难点之一。

Centrifugal pump at the structure on a lot of very difficult to solve the problem, the application of rotary piston pump structure is very easy to resolve, and thus derived many new fields of application.

诸多在离心泵结构上很难解决的问题，应用旋转活塞泵结构就很容易解决，并由此派生出许多新的应用领域。

There are, of course, many more householders who are under-insured, however the extent of this problem is more difficult to assess.

当然有，更多的住户谁正在保险的，但这个问题的程度有更难以评估。

One source of the problem is China's fractured farming sector, comprised of small landholdings which make regulation difficult, experts said.

专家们说，造成这个问题的一个原因是中国的农业部门处于割裂状态，增加了管理难度。

At present, many teacher graduates from normal schools find it difficult to apply advanced teaching ideas and methods they've learned in classrooms,to say nothing of those teachers without any formal pre-service training. To a certain extent,this problem has resulted in widening theory-practice gap in teacher education, and adversely affected teacher professionalisation as well.

目前，很多师范的高校毕业生甚至还有受过职后培训的教师在进入岗位以后，不知道如何把先进的教育的理念和方法运用到实际教学当中去，这在某种程度上导致了教师教育理念与教育教学实践相脱节的现象，也深深影响着教师专业水平的提高。

After analyzing fully-mechanized sub-level caving technology in the case of special thick and hard coal seam, it is presented that the increment of cavability of hard roof coal and available control of gas are the main difficult technology problem to be faced.

通过对特厚坚硬煤层综放开采技术的系统分析，指出提高坚硬顶煤的冒放性和瓦斯的综合治理是该条件下综放开采所面临的主要技术难题。

The problem is made worse by the fact that most of the hundreds of treaties meant to solve global environmental concerns have separate secretariats, which makes cooperation among the collection of bodies difficult, to put it mildly.

为了解决全球环境问题制定了数百项条约，但这些条约组织大多数各自为政，很难实现彼此合作，这种状况－－可以毫不夸张地说－－使得联合国环境规划署面临的问题变得更加严重。

As we know,the measurements of shipborne infrared surveillance system are only two angles,which make the tracking problem become more difficult.

通过讨论舰载红外警戒系统的多目标跟踪算法，分析目标与传感器的特点，提出了一整套多目标跟踪的算法。

As we know,the measurements of shipborne infrared surveillance system are only two angles,which make the tracking problem become more difficult.

对于红外系统，目标跟踪的最大特点是观测量只有角度，没有距离，这就使得传统的跟踪滤波问题遇到困难。

One of the most important, most difficult, and most exasperating unsolved problems of operator theory is the problem of invariant subspaces

算子理论中最重要、最困难也最令人烦恼的未解决问题之一就是不变子空间问题。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。