lastname

例句：

1. 1.He is the only person whose lastname I have ever met.
   他是我唯一认识的人的姓氏。
2. 2. The lastname of the family is Smith.
   这个家庭的姓氏是史密斯。
3. 3.She has a lastname that is quite common in her country.
   她的姓氏在那个国家相当常见。