单身的

例句：

1. 1. She is single and doesn't have a partner.
   她单身，没有伴侣。
2. 2. He prefers to live alone rather than in a crowded city.
   他宁愿独居也不愿生活在拥挤的城市里。
3. 3.The couple decided to get married after being together for 20 years.
   这对夫妇在一起生活了20年后决定结婚。