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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.，详情可参考heLLoword翻译官方下载
References & Citations，详情可参考体育直播
（一）未经批准，安装、使用电网的，或者安装、使用电网不符合安全规定的；
Nasa said he had "turned a potential tragedy into a success" after an attempt to land on the Moon was aborted because of an explosion onboard the spacecraft while it was hundreds of thousands of miles from Earth.