上海市社区体育舞蹈以体育活动点(晨晚练点)为主要开展形式。
The main form of Shanghai community sports dance is sports activities place (morning and evening exercises point).
历史教授主要开展人类历史和历史编纂学的课程，同时也开展研究。
Postsecondary history teachers teach courses in human history and historiography. They also conduct research.
为此，作者主要开展以下几个方面的研究工作：一是拖动系统的优化设计。
Therefore, the author mainly carry out the following areas of study: First is the optimum design of drive system.
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