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Some communities have agreed to share online—geneticists, for example, post DNA sequences at the GenBank repository ( ' , 库), and astronomers are accustomed to accessing images of galaxies and stars from, say, the Sloan Digital Sky Survey, a telescope that has observed some 500 million objects—but these remain the exception, not the rule.
出自-2017年6月阅读原文
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Even today, says the legend, the girls can be seen above the towering rock as seven shining stars in the night sky.
出自-2016年12月听力原文
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Smith touches on construction methods, the revolutionary invention of the automatic lift, the practicalities of living in the sky and the likelihood that, as cities become more crowded, apartment living will become the norm.
出自-2013年6月阅读原文
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More than paradise lost, a perishing rain forest could trigger a domino effect - sending winds and rains kilometers off course and loading the skies with even greater levels of greenhouse gases - that will be felt far beyond the Amazon basin.
出自-2013年6月阅读原文
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Some communities have agreed to share online—geneticists, for example, post DNA sequences at the GenBank repository 库, and astronomers are accustomed to accessing images of galaxies and stars from, say, the Sloan digital Sky Survey, a telescope that has o
2017年6月六级真题（第一套）阅读 Section C