分析:主语:Americans;谓语:say;that引导一个宾语从句,还包含有一个省略了关联代词的定语从句,a person can be sure in life修饰two things. 当先行词在定语从句中作宾语时,常可省略。
Americans often say that there are only two things a person can be sure of in life: death and taxes.(*)
SPARQL被设计用来查询以rdf数据模型表示的数据,这种数据模型用一个三元组来表示数据,每个三元组都具有一个主语、一个谓语和一个宾语。
SPARQL is designed to query data represented with the RDF data model, which represents data as a collection of triples, each of which has a subject, a predicate, and an object.
RDF文档由一些简单的语句组成,每个语句包含三个部分:主语、谓语和宾语(值)。
RDF documents are made up of simple statements that consist of three parts each: the subject, the predicate, and the object (value).
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