Childhood Cancer Less Common in Twins

笔者本人是孪生姐妹之一,我的孩子也是一对龙凤胎,所以,我对这条有关Twins的消息便特别有兴趣。文章的主题句“拎”出本文要义,而且给了一个百分比:Twins experienced some 20％ fewer childhood cancers than expected。人类对自身的认识尚处在初级阶段,文章承认:Why twins are less likely todevelop cancer in childhood remains a mystery。但是,研究人员有自己的分析,你同意吗?】