If the projection machine were slowed down very materially, your sense of sight would detect each separate picture and the gap between.

假如放映机很是显著地降低速度，你的视觉会觉察到每一单独的图片，和图片之间的间隙。

youdao

He refused to develop projection technology, reasoning that if he made and sold projectors, then exhibitors would purchase only one machine—a projector—from him instead of several.

他拒绝研发投影技术，理由是：如果他研发并且销售放映机，电影放映者们就只会从他那里买一台机器，而不是几台。

youdao

Static trials are necessary as methods of projection and estimation of airplanes for their endurance used in the machine construction are ideal and different from reality.

静力测试很必要，正如在制造时对于飞机的耐久度进行的计算和估计一样，但是理想状态与现实情况是有区别的。

youdao

Another photo showed the machine, tripod-mounted and about the size of an old-style projection television and housed in blue plastic.

WSJ: Police Test New Scanner