V膬n S峄璾
@vansuu
gm (good math!) https://www.brunogavranovic.com/posts/2022-02-10-optics-vs-lenses-operationally.html
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Hanana馃幁
@hanana
Ch岷縯 m岷 th么i! 馃槄馃槣 Ch煤c b岷 lu么n c贸 nhi峄乽 媒 t瓢峄焠g s谩ng t岷!
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