材质：塑料 金属
带彩色插图的指导书展示了在光学领域的基本概念及的工作原理。用镜
子做一些科学活动，如2 合1、5 合1 甚至更多活动。
The guidebook with color illustrations shows the basic concepts and working principles in the optical field. Do some scientific activities with a mirror, such as 2-in-1, 5-in-1, or even more activities.
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