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四十亿

四十亿四十亿

四十亿

例句：
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As it stands the U. S. government spends roughly $4 billion a year on energy research and development.
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Dial back the clock nearly 4 billion years, to a time called the Archean, and the sun would appear about 30% dimmer than it is now.
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From that stupid bacteria to us, with a microphone, with a computer, with an iPod -- four billion years.
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The two fields could provide gas worth $4 billion a year.
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Four billion years ago, it vanished, taking with it the planet's chances of evolving life as we know it.
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Indeed, if the vast majority of the four billion Asians continue to improve their livelihoods, the world would become a better place.
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'We're down to three or four billion and we feel like we've got no option but to file, ' Mr. Schwartz said, in a reference to bankruptcy.
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After all, "our planet has been getting along just fine for more than four billion years, " added Nasa.
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The 2007 budget for the US Military covers Jack Bauer, two pistols and four billion rounds of ammunition.
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He used computer simulations to explore what the solar system may have looked like some four billion years ago.
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Four billion years ago was a hellish time on planet Earth.
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All the panes of glass in the world today cover about four billion square meters.
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The two sides have bridged this gap for now by agreeing to cut $4 billion for starters.
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