We were going to have a clicker slide on how many bounced back but it looks like we're having a little technical difficulty with that.
发生背散射,球被弹回来了的,同学请你们站起来,让我算算。
麻省理工公开课 - 化学原理课程节选
应用推荐
模块上移
模块下移
不移动