1、In many countries, it is becoming increasingly common for unmarried couples to live together as cohabitants.
在许多国家，未婚夫妇作为同居伴侣共同生活的现象越来越普遍。
2、Her cohabitant decided to move out, and she had to find a new roommate to share the rent with.
她的同居伴侣决定搬出去，她不得不找一个新的室友来分担房租。