back projector

例句：

1. 1. The back projector was a great way to watch movies at home.
   反向放映机是在家看电影的好方法。
2. 2. The back projector helped me see the movie clearly.
   反向放映机帮助我清楚地看到了电影。
3. 3.The back projector is a popular choice for watching movies in dark rooms.
   反向放映机是黑暗房间观看电影的热门选择。