音标：[,naitrәsilsʌl'fjjәrik] ；

a. [化]亚硝基硫酸的

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HEALTH REPORT - New Heart Drug Shows Promise in African Amer

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Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

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