1.It was hardly discernible in a US Gross National Product climbing vigorously toward the 2 thousand billion mark.
2 It seemed to undergo a fundamental transformatin.
參考答案:1。 美国国民生产总值迈向2000亿元的攀升力是很难去分析的。
2。似乎产生了根本性的改变了。
（注："transformation", not"transformtin")