例句與造句

1. These principles recur throughout this book and are introduced here to give you an overview of what economics is all about
   這些原則重復貫穿于這本書中，向你們介紹對經(jīng)濟學的一個總體的看法。
2. It's difficult to find what economics is all about in a sentence. 用what economics is all about造句挺難的