thirteen billion

十三亿───thirteen billion

Thirteen years later, in1996, the Air Force awarded a $1.1 billion dollar contract to build asouped-up version of the Airborne Laser Laboratory.───13年后，于1996年，空军授予11亿美元美元的合同，以建立一个机载激光实验室的升级版。

But Tribune was struggling with thirteen billion dollars of debt in a recession.───但是，论坛公司在衰退期间背负130亿美元的债务。

There are over thirteen billion persons in China.───中国有超过13亿的人口。