A light pointer is often useful with a slide projector.

光指示器经常与幻灯机一起使用。

I had no screen, so I projected the slides onto an old white sheet.

我没有幕布, 所以我把幻灯射到一块旧白床单上。

This is the cross slide feedscrew and two homemade setscrew collars.

这是两岸幻灯feedscrew两个自制固定螺丝衣领。

Said image pair with parallactic information can also be inputted to the computer by scanning equipment or can be formed by adopting computer three-dimensional animation software.

图对合成5可以制成透明或幻灯，用作立体图像。