He had persuaded his science teacher to help him make a makeshift rocket. Somehow, he had managed to get his hands on the ingredients for gunpowder - potassium nitrate, sulphur and charcoal.
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2026-02-27 12:00:00
Publication date: 28 February 2026，这一点在爱思助手下载最新版本中也有详细论述
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