The odds of having both diseases are thought to be about one in a billion.
这种病症发生的几率被认为是在十亿分之一左右。
Using one of these checksum algorithms reduces the chance of accidental corruption to less than one in a billion (though deliberate attacks are still a possibility, as you'll see).
使用这些校验和算法中的一种可以将程序遭受意外破坏的机率降低到少于十亿分之一(尽管故意攻击仍有可能)。
Safety concerns have been one of the biggest reasons why the country has lost over half a billion in revenue already in the first six months of 2016.
该国在2016年前6个月已经损失了5亿多美元的收入,其中最大的原因之一就是安全问题。
Portugal's borrowing costs rose sharply Wednesday as it sold almost one and a half billion dollars in short-term securities.
VOA: special.2011.04.08
If the rate of population growth of the United States between 1820 and 1850 had sustained over time, we'd have today approximately one and a half billion people in the United States.
如果在1820至1850年间,美国人口增长率保持下去的话,今天我们的美国,就会拥有近十五亿人口
And the plan calls for one hundred billion dollars a year in aid to poor nations to deal with climate change.
VOA: special.2009.12.26
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