According to the census results, the average family size of the 31 provinces, autonomous regions and municipalities on the mainland was 3.44 persons, down 0.52 from the figure of 3.96 in the 1990 population census.是什么意思_According to the census results, the average family size of the 31 provinces, autonomous regions and municipalities on the mainland was 3.44 persons, down 0.52 from the figure of 3.96 in the 1990 population census.在线翻译_英语_读音_用法_例句