求翻译：多年来，高校大学生基层党组织的活动主要是学习文件，听报告，参观革命历史纪念地，参加义务劳动等活动是什么意思？

Over the years, college students activities are mainly grass-study documents, listening to the report, visit the memorial to the history of the revolution, to participate in volunteer work and other activities

Colleges and universities for many years, most of the activities of a party organizations at the grass-roots level university students studying the documents, hearing the report, visit revolutionary historical monuments, and participate in activities such as voluntary work

For many years, the university university student basic-level party organization's activity mainly studies the document, listens to the report, the visit revolution history commemoration place, activities and so on participation voluntary labor

For many years, grassroots activity is mainly of University students study the documents, reports, visited historical monument of the revolution, participate in voluntary labour and other activities