projector

n. 放映机(探照灯,发射装置,设计者,制图投射线)

How long will it take to set up the projector?

把这个放映机安放好需要多长时间?

The film flew off the spool and wound itself round the projector.

电影胶片从卷轴滑出缠绕在放映机上了.