用"墮落"形容"同居"合理嗎？

　

        The one-year national survey was conducted by the Beijing Normal University's psychology department, which interviewed more than 2 million people around the country.

　　北京師范大學(xué)心理學(xué)系開展的一項(xiàng)為期一年的全國(guó)調(diào)查共對(duì)全國(guó)200多萬人進(jìn)行了訪問。

　　A report on love and marriage in Chinese society was compiled based on the survey, whose results were released on Tuesday.

　　該調(diào)查結(jié)果于本周二公布，有關(guān)部門還根據(jù)該調(diào)查編撰了一份有關(guān)中國(guó)社會(huì)愛情及婚姻觀的報(bào)告。