说说山姆大叔，他有一堆债要还，每年大概有4万亿美元，而山姆大叔每年的收入大概刚刚2万亿美元多一点，为了弥补差额，也就是赤字，他跟其他美国人一样，借钱。
He has a lot of bills to pay, almost $4 trillion worth every year. Uncle Sam’s income is a little over $2 trillion per year.
说说山姆大叔，他有一堆债要还，每年大概有4万亿美元，而山姆大叔每年的收入大概刚刚2万亿美元多一点，为了弥补差额，也就是赤字，他跟其他美国人一样，借钱。
He has a lot of bills to pay, almost $4 trillion worth every year. Uncle Sam’s income is a little over $2 trillion per year.
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