2011年4月参加班集体团日活动现场工作人员的翻译：Class a day set aside for Youth League organization activities in April 2011 to participate in activities on site 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

April 2011 to participate in class group activities, group on-site staff

Class a day set aside for Youth League organization activities in April 2011 to participate in activities on site

In April, 2011 participates the class collective group date to move the field work personnel

April 2011 participated in workshops on collective mission activities on-site staff

Class a day set aside for Youth League organization activities in April 2011 to participate in activities on site