2011.8．16-2011.8.20 职业健康与安全全体工人图书馆报告厅 2小时的翻译：2011.8. 16-2011.8.20 occupational health and safety of all workers in the Library Auditorium 2 hours 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

2011.8.16-2011.8.20 occupational health and safety of all workers in the library lecture hall two hours

2011.8. 16-2011.8.20 occupational health and safety of all workers in the Library Auditorium 2 hours

2011.8.16-2011.8.20 Occupation health and safety All worker Library report hall 2 hours

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2011.8. 16-2011.8.20 occupational health and safety of all workers in the Library Auditorium 2 hours