查询词典 problems

The paper explores the current situation and existing problems of railway goods transportation safety and quality after insurance being carried out, and analyzes the causes of these problems,and puts forward several countermeasures to solve them.

本文论述了铁路货运实行保险后，货运安全质量的现状及存在的问题，分析了产生这些问题的原因，并提出解决问题的若干对策。

However, there are still many serious problems in the field of teacher training for researchers to tackle. The main problems are listed below

但是，在肯定成果的同时，我们也必须正视在现有的教师培训中还存在一些严重的误区和问题，概括而言，主要体现在以下三方面

With the development arise some problems of the wheel/rail performance, the requirement of the train traction for the adhesion of wheel/rail will become more and more strict, and rail corrugation of wheel/rail, rolling contact fatigue and derailment will become more and more serious. The solution to the problems will have direct effects on the railway development.

当前世界铁路正朝着高速和重载的方向发展，随之而来的是列车牵引对轮轨粘着的要求越来越高，而轮轨的波浪形磨耗、滚动接触疲劳、脱轨等轮轨关系问题越来越严重，其解决与否直接影响到铁路的快速发展。

The development tendency of the railway construction in the world today is serving high speed trains and csirrying heavy load. With the development arise some problems of the wheel/rail performance, the requirement of the train traction for the adhesion of wheel/rail will become more and more strict, and rail corrugation of wheel/rail, rolling contact fatigue and derailment will become more and more serious. The solution to the problems will have direct effects on the railway development.

当前世界铁路正朝着高速和重载的方向发展，随之而来的是列车牵引对轮轨粘着的要求越来越高，而轮轨的波浪形磨耗、滚动接触疲劳、脱轨等轮轨关系问题越来越严重，其解决与否直接影响到铁路的快速发展。

Finally, we combine all the subprograms, along with graphical user interfaces, to complete the program. To obtain circle and center points, we use graphical methods in three-position problems and vector loop methods in four-position problems.

其中三个位置问题部分利用几何法求解，四个位置问题利用向量法求解，五个位置问题则利用四个位置问题之叠合以求解。

In a three-class construction supply chain which is composed by the raw material suppliers, the semi-manufactured goods suppliers and the contractors, there exist project scheduling problems related with the semi-manufactured goods suppliers and the contractors, so do raw material ordering problems which is related with the raw material suppliers and the semi-manufactured goods suppliers.

在一个组织结构确定的由原材料供应商-半成品供应商-承包商构成的三层工程供应链网络中，在半成品供应商和承包商之间存在工程调度的问题，在原材料供应商与半成品供应商之间存在原材料订货的问题。

Tea tree oil has solved the acne problems of thousands that suffer from all types of blemish problems.

茶树油，已经解决了青春痘的问题，成千上万遭受来自所有类型的缺陷问题。

In the Dragon Gate type taper design process, I met many problems, like, the taper constructs in six directions movement has several kinds of different plans choice problems, does the power transmission problem, as well as in attack in the silk process to prevent to overload phenomena and so on screw tap break, decayed teeth which or other reasons appear.

在龙门式攻丝机的设计过程中，遇到了不少问题，如，攻丝机构的前后、左右、上下六个方向上的运动的几种不同方案的选择问题，动力传递问题，以及如何在攻丝过程中防止因过载或其他原因出现的丝锥断裂、烂牙等现象。

As one of key problems urgent to be resolved in the fields of mechanics, material science and sheet metal forming, constructing reasonable yield criterion, work-hardening law and stress-strain relationship is very important for predicting distribution of stress and strain in sheet metal forming, as well as for improving FEA simulation precision and resolving engineering problems.

各向异性板料的屈服准则、塑性变形强化规律以及应力应变关系的合理建立，对于准确预测板料成形过程中应力应变分布，提高板料成形有限元模拟精度，以及精确解析板料成形工程问题等方面具有重要的意义，这一基础性的研究一直是力学界、材料界、板料成形领域致力研究的关键问题。

Constructional character and problems in coiled steam air heater of coal-fired boilers is analyzed and a thinking of new type of tube in tube air heater is proposed.Some practical problems in design and production of the new type air heater are discussed.

对燃煤锅炉原有盘管式暖风器结构特点及存在问题进行了分析，提出了新型套管式暖风器的设计思路，探讨了新型套管式暖风器设计制造过程中的几个具体问题。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。