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There might be a massive black hole at the center of our galaxy swallowing up stars at a very rapid rate.

在我们银河系的中心很可能存在着一个巨大的黑洞正以极快的速度吞食着星球。

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The center says September Arctic sea ice is decreasing at a rate of more than eleven percent every ten years.

VOA: special.2009.10.27

Moreover, the 1-5 scale used by the center to rate fire danger and preparedness was raised from 3 to 4.

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While birth rates for almost all other age groups are at historic lows, according to a 2012 report from the National Center for Health Statistics, the rate for women in their late 30s and early 40s is on the rise.

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The center is meeting its performance standards, and its 77% retention rate is more than twice as good as Sprint's call center in the Kansas City suburbs.

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