that, he worked on a safer explosive called gelignite (葛里炸药).During his lifetime, Nobel invented more.... Later he studied chemistry in Paris and worked in the USA.When he was 31, Nobel invented dynamite (炸药 ……
worked on a safer explosive called gelignite (葛里炸药).During his lifetime, Nobel invented more than... studied chemistry in Paris and worked in the USA. When he was 31, Nobel invented dynamite (炸药 ……
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