A light pointer is often useful with a slide projector.

光指示器经常与幻灯放映机一起使用。

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

我没有幕布, 所我把幻灯到一块旧的白床单上。

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

这是两岸幻灯feedscrew两个自固定螺丝的衣领。

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成透明影或幻灯，用作立体图像的影。