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A light pointer is often useful with a slide projector.是什么意思？

A light pointer is often useful with a slide projector.

光指示器经常与幻灯片放映机一起使用.

相关词汇
light pointer is often useful with slide projector

light

n. 光，发光体，电灯，点火器；adj. 轻的，明亮的，浅色的，少量的；v. 点燃，照亮，用光指引；adv. 轻地，轻装地；

pointer

--

is

vt.& vi. 是（be的三单形式；n. 存在；

often

adv. 常常，经常，时常，再三；

useful

adj. 有用的，有益的，有帮助的，令人满意的；

with

prep. 和，跟，随着，关于，和…一致；

slide

vi. 滑落，下跌，打滑，[棒球]滑垒；vt. 衰落（成），逐渐降低，使悄悄转动，（使）快捷而悄声地移动；n. 幻灯片，降低，滑梯；

projector

n. 放映机，幻灯机，投影仪，设计者，放映技师；
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