From a Hubble analysis of the stars' colors, Crockett and his team calculated that the star-formation boom started about a billion years ago, a comparatively recent event in cosmological history.

通过哈勃行星分析行星的色谱，科洛·科特和他的小组计算出这些恒星的形成大约在1亿年前突然爆发起来，通过在宇宙学历史上与最近的大事件的比较。

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Since 2007, overall listing is the formation of an unprecedented boom, if reform of non-tradable shares is the most import thing in 2006, then in 2007, is overall listing.

2007年以来，整体上市更是形成了一个空前的热潮，如果将2006年称为股改年的话，2007年可以称作是整体上市年。

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The state has had a moratorium on the process since 2008 while other states in the gas-rich Marcellus Shale formation have seen local economies boom as drilling rigs have sprouted up.

WSJ: NY senators seek fracking delay to await key study

Take North Dakota, where a stupendous energy boom radiating out of the Bakken formation has attributed to a tiny 3.1% unemployment rate.

FORBES: North Dakota Leads List Of America's Fastest-Growing States

The state has had a moratorium on the process since 2008 while other states in the gas-rich Marcellus Shale formation, such as Pennsylvania, have seen local economies boom as drilling rigs have sprouted up.

NPR: AP: NY Fracking Held As Cuomo, RFK Jr. Talk Health