音标：[,naitrәsilsʌl'fjjәrik] ；

a. [化]亚硝基硫酸的

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VOA标准英语2009年(七月)

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VOA常速英语2008年（四月）

HEALTH REPORT - New Heart Drug Shows Promise in African Amer

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A small corner shop in suburban Sydney is an unlikely place to hear the horrors that force people from their homes and into the devious and dangerous world of people smugglers. Hassan Abotbeek fled Iraq and arrived in Australia by boat more than seve

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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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