Pew Research Center 中文 关注 大多数美国成年人在 40 岁出头时,曾与未结婚的伴侣共同生活过。 大约四分之三的美国人在 30 多岁后期或 40 多岁早期曾与未结婚的伴侣共同生活过。 Most U.S. adults have lived with a romantic partner they’re not married to by their early 40s pewresearch.org Pew Research Center 中文 RSS thenote.app