Although having varied supply mode, there still exist problems of insufficient quantity and unreasonable supply structure.
我国城市准公共物品的供给方式已多样化，但仍存在总量供给不足和供给结构不合理等现象。
There exist problems with the rate of renewal and reuse, over packing, under-developed and unbalanced packing industry, and packing safety.
我国目前的包装现状不能令人满意，突出表现在回收利用率低、过度包装、包装工业落后而且不平衡、包装安全存在问题等方面。
The explosive accident of the underground gasoline pipeline occurred in Guigang Petroleum Branch revealed to us that there exist problems in the safety work.
贵港分公司发生的埋地汽油管线爆炸事故，暴露出在安全管理工作上存在的问题。
There exist problems of cold-working hardening and hydrogen-brittle in the cold-drawing process for seamless steel tube, responsible for the cracking in the steel tube.
在无缝钢管的冷拔过程中，存在着冷作硬化和氢脆现象，它们是造成钢管开裂的主要原因。
But still exist problems of low exploration intensity and low integrated study extent and so on. To raise coal resources exploration intensity is urgent affair in Inner Mongolia.
但存在勘查程度低、综合研究程度差等问题，提高内蒙古煤炭资源的勘查程度是当务之急。
The feed pump system is controlled by single loop control theory, but it is truly multivariable system, so feed pump control system in use exist problems about safety and efficiency.
现有给水泵系统都采用单变量系统进行控制，但该系统本质上是多变量系统，用单变量方法解决多变量问题给系统安全经济运行带来隐患。
Accountant delegation system, established to solve the problem of distorting accounting information has been on trial over one year. It does its good, but there still exist problems.
为解决会计信息失真而产生的会计委派制在我国已试行一年多了，在取得成绩的同时也仍存在着不少问题。
However, for ordinary nano-materials, there exist problems such as difficult separation, easy pollution, high cost and so on, which seriously restrict the application in wastewater treatment field.
但是由于普通纳米材料存在分离难、易污染、成本高等问题，严重制约了其在水处理领域的应用。
However, for ordinary nano-materials, there exist problems such as difficult separation, easy pollution, high cost and so on, which seriously restrict the application in wastewater treatment field.
但是由于普通纳米材料存在分离难、易污染、成本高等问题，严重制约了其在水处理领域的应用。
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