双语例句原声例句
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世界上有几亿头山羊。
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它一定非常古老，大约有40亿年，有几亿年的误差。
It must be really old, about 4 billion years, give or take a few hundred million years.
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通过这种方法，科学家们获得了火星南部高地40亿年到最年轻的火山地区（几亿年）的年龄估计数。
Age estimates ranging from four billion years for Mars's southern highlands to a few hundred million years in the youngest volcanic areas were obtained in this way.
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The problem is you've got to make hundreds of millions of doses sometimes in order to have an effect on progress of the disease.
问题是有时候你不得不去制造几亿支疫苗,以便在疾病进展时发挥作用
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Yale also has an art collection, which is worth many billions, but we don't count that as part of the endowment because they will never sell it so it doesn't provide income for us.
耶鲁还有一些艺术藏品,价值好几亿美元,但我们并不把它作为基金的一部分,因为学校不会卖掉它们,所以它不会为学校提供任何收入
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