This essay will present the following problems and state my opinions on how to address them.
本文将提出以下问题，我会就如何解决这些问题提出自己的看法。
Described the application and the present state of the research for the dulling material. And involved some problems from it.
叙述了消光材料的应用和研究现状及存在的问题。
This paper deals with the properties, the usage state and the problems of alloy grain refiners, which were at present used in industry.
分析研究了工业生产中目前所使用的合金细化剂的性能、应用状态以及存在的问题。
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