a nasty one

例句：

1. 1.She was very upset when she found out that her boyfriend had a nasty one.
   她发现她的男朋友有一个讨厌的人时，非常生气。
2. 2.The restaurant has a lot of customers because it serves delicious food and has a nice atmosphere.
   这家餐厅有很多顾客，因为它的食物美味且环境舒适。
3. 3. I don't like the way he treats people; he's just a nasty one.
   我不喜欢他对待人的方式，他是个讨厌的家伙。