1·While cohabitation has been on the rise, the overall share of young adults either married or living with an unmarried partner has substantially fallen since 1990.
尽管同居现象一直呈上升趋势，但自1990年以来，已婚或与未婚伴侣同居的年轻人的比例总体大幅下降。
2·The decline in marriage has been offset by a rise in cohabitation.
同居人数的增加跟结婚人数的减少相抵消。
—— 《柯林斯英汉双解大词典》
3·In most cases, those couples said they considered cohabitation as a step toward marriage.
大部分情况下，这些伴侣说他们认为同居是走向婚姻的一步。
4·The Oxford University study examined marriage and cohabitation rates across the developed world and compared them to attitudes towards the roles of men and women at home.
牛津大学的研究考察了发达国家人口的结婚率和同居率，并把这些数据同男人和女人看待家庭角色的态度做了比较。
5·While this research suggests cohabitation in itself can result in lousier marriages, the initial reasons for moving in together could impact the relationship quality.
尽管研究指出同居本身会导致劣质婚姻，但是搬来同住的最初原因可能影响情侣关系的质量。