Because it represents foreigners investing in United States and that generates rates of return that effectively can generate that growth.

其实这和外国人在美国投资的道理是一样的,投资带来的收益，是由美国来埋单的,因而，实际上也同样导致了美国债务的增长。

斯坦福公开课 - 经济学课程节选

There was a sudden change of heart and people wanted to withdraw their -foreign investors wanted to withdraw their money.

可是人心难测,人们突然想取回,外国投资者要撤资

耶鲁公开课 - 金融市场课程节选

It's a measure of how much Americans are saving compared to the attractiveness America as a place to invest.

它能够衡量美国储蓄率的高低,以及外国在本国的投资情况。

斯坦福公开课 - 经济学课程节选

It's attractive to invest more than our savings, that's the trade deficit.

结果是外国投资额大于本国储蓄额，这就形成了贸易逆差。

斯坦福公开课 - 经济学课程节选