English translation for "老大难问题"

a knotty problem of long standing
hard nut to crack

Related Translations:

老大难:  long-standing, big and difficult (problem) 短语和例子老大难单位 unit long considered a tough nut to crack; unit known for its difficult problems long regarded as insoluble; a unit with serious and l

老大难单位:  unit known for its difficult problems long regarded as insoluble

Example Sentences:

	1.	Drought and soil erosion had long been a major problem . 干旱和水土流失一直是个老大难问题。
	2.	You are a difficult case . 你是个老大难问题。
	3.	Jump automobile at bridge end in soft clay area is a difficult problem of highway building over the years 软土路段桥头跳车是公路建设中的一个老大难问题。
	4.	Nowadays , there are some problems that lead to inferior quality and low effectiveness in moral education 摘要学校德育工作中存在著质量与效果偏低的老大难问题。
	5.	Questions of intellectual influence and causation are notoriously difficult , especially in the case of an author so far removed in time 问题的智力影响和因果关系，是个老大难问题，特别是在案件作家如此远的时候。
	6.	In many places there is a problem over intellectual property because of an imbalance of power between copyright and patent holders on the one hand , and the public on the other 在很多地方，知识产权都是个老大难问题，原因就是版权和专利权所有人和公众之间权限的失衡。
	7.	It throughly solved some long time complicated questions such as high service rate in dc motor , large quantities of maintaining contact type drive controller , high energy consumption of dc locomotive 彻底解决了直流电机维修率高、换向火花及接触组火花大、触头式司控器维修量大、直流电机车能耗高等老大难问题。
	8.	Star granville 2 antivirus software is a green , super fast speed , the use of standardized design of antivirus tools , so bloated from the past , huge , manslaughter and other antivirus software long - standing problem 星威2杀毒软件是一款绿色的，速度超级快，采用标准化设计的杀毒工具，因此摆脱了以往的臃肿，庞大、误杀等杀毒软件的老大难问题
	9.	Abstract : by using early - strength frost - resistant agent in consolidatinganchor bolt , extra early - strength frost - resistant thickener and special technology in shotcreting , the difficulty arising from freezing weather with an ambient temperature of - 10 - 18 was solved 文摘:介绍在环境气温- 10 - 18条件下，采用早强抗冻锚固剂固结锚杆、超早强抗冻粘稠剂和特殊工艺喷射混凝土，使隧道施工支护及时，解决了冬期施工喷锚难的老大难问题。
	10.	It possesses not only the self - learning ability and adaptability , but also the function of self - adjusting factors . based on fuzzy set , neural network theory , the fuzzy control model and fuzzy neural network control model of multi variable system are presented . based on the automatic core - welding line of shop floor control system in yangzhou radiator plant computer integrated manufacturing system ( ys - cims / sfcs ) , the fuzzy logic theory was applied to the controlling device and established the main heating room fuzzy temperature controller and finally was put into practical use 本文采用了基于神经网络技术的智能pid控制策略，设计了一类具有自学习和自调整比例因子功能的神经元网络自适应pid控制器的结构及算法；为解决结构不确定性的复杂多变量系统的控制，基于模糊集及模糊系统、神经网络理论，建立了多变量系统的模糊控制模型及模糊神经网络控制模型；针对扬州水箱厂计算机集成制造系统车间管理与控制系统( ys - cims sfcs )中的实际工程问题，设计和开发了散热器芯子烘焊自动线主烘腔温度模糊控制器，解决了生产中长期存在的老大难问题，提高了产品质量，降低了单产能耗。

Similar Words：

"老大靠边站2" English translation, "老大龙湾" English translation, "老大慢半拍" English translation, "老大难" English translation, "老大难单位" English translation, "老大娘" English translation, "老大娘特别为伤员炖了一只鸡" English translation, "老大徒伤悲" English translation, "老大爷" English translation, "老袋鼠" English translation