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诺贝尔发明炸药,爆破取代了人的艰辛劳动;人们希望居室冬暖夏凉,科学家发明了空调……人们追求美好的生活和
Nobel invented explosives, blasting to replace the hard work of people; people hope that winter and summer, scientists invented air-conditioned ... people pursue a better life and