新闻背景: 今年5月15日,航天英雄杨利伟和中国航天研究所的专家们到某大学做报告。杨利伟入场后,场内爆发雷鸣般的掌声。当杨利伟离席,国家863计划空间站的专家开始主题演讲的时候,大学生们的热情随着杨利伟的退场而消退。几分钟后,全场4000多学生走了一大半。 News background: On May 15 this year, space hero Yang Liwei and experts from the China Aerospace Institute reported to a university. After Yang Liwei entered the stadium, thunderous applause broke out. When Yang Liwei left, the experts of the National 863 Space Station began to deliver keynote speeches. The enthusiasm of college students subsided with Yang Liwei’s exit. A few minutes later, more than 4,000 students in the audience walked more than half.