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Objective To study the application of perfluorocarbon in corneal metaphase preservation.

目的　探讨氟碳在角膜中期保存中的应用价值。

Just as the prophase, metaphase and anaphase of Ming Dynasty, the research of Su Shi' s prose during that time can accordingly be divided into three phases, called the period of smooth development, transition and prosperity.

明代的苏文研究大致可以分为平静发展期、变化过渡期和全面繁荣期,大致与明代的前期、中期、后期相对应。

A summary report of medium-term outlook for global fertilizer demand,supply and trade during the period of 2006～2010 is presented.

本文是2006～2010年全球肥料需求、供应及贸易中期展望的摘要报告。

Study on evaluation of coal resource of middle exploitation stage;

开发中期阶段的煤炭资源综合评价研究——以兖州煤田为例