点击下方单词,选择对的这个单词
点击下面链接下载与本句相关的学习资源，包括PDF教材和音频练习，方便课后复习：
1. 投影仪；放映机[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;A projector is a machine that projects films or slides onto a screen or wall.
1. an optical instrument that projects an enlarged image onto a screen
2. an optical device for projecting a beam of light
多通过句子记忆单词，而不是单独死记硬背。
