This paper discusses the status and trends of the films classes, the materials used in the PDP and the technology for the preparation of films.
本文对PD P中所用膜的种类、材料及成膜技术的现状、进展以及存在的问题进行了论述。
On weekdays, our whole family is fully engaged. Father makes preparation for his classes or writing monographs or research papers;
工作日，全家都忙着干活，爸爸准备备课笔记，撰写专著与论文；
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