# 例句
1、I thought I saw a ghost but it was just anopticalillusion.
我以为我看见鬼了,其实只是一种幻觉。
2、They concentrated on better definition of theopticalimage.
他们致力于提高该光学影像的鲜明度。
3、A mirage is anopticalillusion.
海市蜃楼是一种视错觉。
4、Theopticalsystem of the eye stimulate cell of the retina.
眼睛的视觉系统刺激视网膜内的细胞。
5、Microscopes and telescopes areopticalinstruments.
望远镜和显微镜是光学仪器。