Кочергин. Нельзя злиться, слабость это
6 months ago 00:32:22 1
![Почти невозможно: как изобрели синий светодиод [Veritasium]](https://sun9-21.userapi.com/c8DBu1hdyPy19d9MJAk66_8RY_VuUFMGtfcUtQ/EZwklcQHfmY.jpg)
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