session基本意思是会话、会议,从sold out来看,应该是个培训班之类的研讨会.
翻译就是：培训会的票还没卖完.sold out 是售罄、卖完的意思：Train tickets have been sold out,so I can't go home in time.火车票卖完了,我无法按时回家了.