单词：elliptic compasses
单词：elliptic compasses 相关文章
76 years after Pluto's discovery and after 17 years of research and development, Nasa's new Horizon Spacecraft sets out for Pluto. Travelling at around a million miles a day, it's on a 9-year, 700-million-dollar journey to reach Pluto and review its
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我们今天学的词是：planet。Planet是行星。不过你听说了吗，太阳系中排行第九的行星冥王星Pluto被降级了。Astronomers' reclassification strips ninth planet of status in solar system. 国际天文学会对行星重新定
英语每日一词
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（
薄冰实用英语语法详解
[00:01.56]Gunpowder [00:03.47]Gunpowder was invented by the Chinese [00:05.73]in the eighth century AD. [00:08.28]Early Chinese scientists discovered [00:10.64]that they could make an explosive substance [00:12.76]by mixing sulphur,charcoal and saltp
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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
我们今天学的词是：planet。Planet是行星。不过你听说了吗，太阳系中排行第九的行星冥王星Pluto被降级了。Astronomers' reclassification strips ninth planet of status in solar system. 国际天文学会对行星重新定
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