在N_2保护和敞开体系两类不同的反应环境中，分别研究了纯水溶液、葡聚糖水溶液和聚乙二醇水溶液中胆红素钙晶体的成核与生长情况。
The crystal growth of calcium bilirubinate was studied in pure water, dextran and polyethylene glycol aqueous solutions with the protection of N2 or in the open system.
向其敞开高端教育体系的大门，这是尤其重要的一步。
Opening up its elite education system to minorities, is an especially critical step.
中国应当向多边体系敞开双臂。
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