例句與造句

1. As a result of a research , service life ( gets red rust ) of galvanized steel is 15 - 18 years around countryside , 3 - 5 years around industry region ， which is n - tupling even ten - tupling than a normal steel
   經(jīng)研究，在鍍鋅量350克平方米（單面）時，鍍鋅鋼板在屋外的壽命（生紅銹） ，田園地帶約為15一18年，工業(yè)地帶大約3一5年，這比普通鋼板長幾倍甚至十幾倍。
2. It's difficult to find n-tupling in a sentence. 用n-tupling造句挺難的