中文说明：光学工程对光路的追迹应用很多 本程序可以很轻松的追迹反射光线
English Description：
There are many applications in optical engineering to trace light path. This program can trace and reflect light easily
Tracing optical path in optical engineering
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中文说明：光学工程对光路的追迹应用很多 本程序可以很轻松的追迹反射光线
English Description：
There are many applications in optical engineering to trace light path. This program can trace and reflect light easily