The US estimates that corruption costs the country 3 billion dollars a year.

美国估计，腐败每年给该国造成 30 亿美元的损失。

Rich nations pledged in 2009 to give developing countries 100 billion dollars a year to help them deal with climate change.

富裕国家在2009年承诺每年向发展中国家提供一千亿美元，帮助它们应对气候变化。

To reinforce their balance-sheets with dollars, countries must, in aggregate, sell goods and services to America and hold on to the proceeds.

为了用美元来巩固他们的资产负债表，这些国家必须向美国出售商品和服务，并把收益留在手中。