高射投影仪的英文：
overhead projector

overhead是什么意思：
n. 营运开支，普通费用
adj. 在头上的，高架的
adv. 在头顶上，在空中

The hawk is hovering overhead.
鹰在头顶上盘旋。

That was the performance overhead of the profiler.
这就是分析器的性能开销。

Overhead variances may be usefully considered as variable overhead variances and fixed overhead variances.
我们可以把管理费用分为可变费用和固定费用两种。

We heard a jet plane zooming overhead.
我们听见喷射机在头上嗡嗡作响。

Seagulls were flying overhead uttering their mocking cry.
海鸥在头顶盘旋，发出嘲弄的呼叫。

projector是什么意思：
n. 放映机，幻灯机；投影仪；设计者；放映技师

Is that your footage, small projector?
小放映师，是你拍的底片吗？

The projector temperature is above the critical limit. Please allow The projector to cool down by turning off the projector
投影机温度高开限值，应关机让投影机冷却

They also gave demonstrations through the Zeiss projector.
他们还用蔡司投影机进行了表演。

Ensure that the distance from the projector to the screen is at the minimum specified
确认投影机至屏幕距离大于最低限值

If it's your projector, carry a spare bulb.
如果用投影仪，要拿个备用的球茎。