烟火剂 pyrotechnic composition; pyrotechnic compound 烟火节 bonfire night; celebration of light; guy fawkes day ..
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pyrotechnic compound formulation 烟火剂配方
Latvian Geologist Dainis Ozols said he believed someone had dug a hole and tried to make it look like a meteorite crater by burning a pyrotechnic compound at the bottom.
拉脱维亚地质学家戴尼斯说他相信有人故意挖了一个坑并通过在底部燃烧烟火化合物使它看起来像一个陨石形成的坑。
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