Boysdo worse in English when there are girls in their class, researcherswill say today, contradicting the widely held belief that girls arealways a good influence on boys in school.

• 研究人员今天宣称，当班上女生人数较多时，男生的英语就会学得较差。而人们以往普遍认为，在学校中，女生对男生总是有积极影响。