postcard projector

例句：

1. 1.This postcard projector is perfect for showcasing your travel photos.
   这款明信片投影仪非常适合展示你的旅行照片。
2. 2.The teacher used the postcard projector to demonstrate how to fold a paper airplane.
   老师使用明信片投影仪来演示如何折叠纸飞机。
3. 3. The postcard projector was a hit at the local science fair, attracting many visitors.
   这个明信片投影仪在当地科学博览会上大受欢迎，吸引了许多参观者。