例句與造句

1. The use of mathematics and statistics to formulate and test economic theory is referred to as econometrics .
   利用數(shù)學(xué)和統(tǒng)計學(xué)明確地表達一種經(jīng)濟理論，然后測驗這種理論，這就是經(jīng)濟計量學(xué)。
2. It's difficult to find testing economic theory in a sentence. 用testing economic theory造句挺難的