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2、有些名词为自然复数名词，即只有复数的形式，例如： trousers（裤子）glasses（眼镜）scales（天平）tongs（夹子）binoculars（双筒望远镜） pincers（手钳）compasses（圆规）pants（裤子）crossroads（
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VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Shirley Griffith. March seventeenth is Saint Patrick's Day, a time to celebrate Irish culture. The Census Bureau says that in two thousand seven, thirt
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By calculating how old the rocks are where we find these ancient compasses, we can figure out how long ago the magnetized parts were locked in. That tells us which direction was magnetic north tens of thousands of years ago. Surprisingly, its not alw
英语时差8，16