例句與造句

1. Expound the role of the legumes - root nodule bacteria nitrogen fixing system in large development of west area of china , and put forward a constructive suggestion
   摘要對(duì)豆科植物-根瘤菌共生固氮體系在西部大開發(fā)中的作用進(jìn)行了論述，并提出建設(shè)性意見。
2. It's difficult to find root nodule bacteria in a sentence. 用root nodule bacteria造句挺難的