Therefore, the polymer solar cells become one of the heat POTS of present research area.
这样,使得聚合物太阳能电池成为目前该领域的研究热点之一。
How to improve geometric positioning accuracy of CNC machine becomes an significant issue of present research.
如何提高数控机床的几何位置精度成为目前研究的关键问题。
So, how to estimate the value of ecosystem service function effectively becomes the focus of present research and front subject.
因此,如何有效评价生态系统服务功能价值成为当前研究的热点和前沿课题。
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