As sure as honey attracts bees, Valentine's Day attracts scientists with studies about human relations. For example, in recent days, researchers announced new findings about online dating sites. 如同蜂蜜吸引蜜蜂一样，情人节也吸引了科学家们研究人际关系。例如，研究人员最近几天公布了对交友网站的新发现。________________________________________________________.
