Some Suggestions were given on further research and development as well as mass production of dysprosium metal.

讨论了金属镝的研究、开发、工业化生产等方面的问题，并提出了相关建议。

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Recent progress of research and development of modified PP in China is reviewed, and the existing problems are discussed. A few Suggestions are made on further developments.

综述了我国近年来研究开发取得的一系列成果，并讨论了存在的问题，对今后的开发提出了一些建议。

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