最年长的

例句：

1. 1. The oldest child in the family is my sister.
   家里最年长的孩子是我的姐姐。
2. 2. The oldest book in the library is about 100 years old.
   图书馆里最古老的书有100年的历史。
3. 3. The oldest member of our team has been with us for over 20 years.
   我们团队中最资深的成员已经和我们在一起超过20年了。