例句與造句

1. However, prior to the dominance of Relational data modeling from about 1980 to 2005 the Hierarchical database model was commonly used, and since 2000 or 2010, many NoSQL models that are non-relational including Documents, triples, key-value stores and graphs are popular.
2. It's difficult to find hierarchical database model in a sentence. 用hierarchical database model造句挺難的