例句與造句

1. By the age of 19 gauss had discovered for himself and proved a remarkable theorem in number theory known as the law of quadratic reciprocity
   高斯十九歲已經(jīng)獨立地發(fā)現(xiàn)并證明了數(shù)理定理? ?二次互反律。
2. It's difficult to find quadratic reciprocity in a sentence. 用quadratic reciprocity造句挺難的