居先

例句：

1. 1. He always comes before others in the meeting.
   他总是会议中最先发言。
2. 2. She is a first-class teacher, always giving priority to her students.
   她是一位优秀的教师，总是把学生放在首位。
3. 3.The first thing he did was to call his parents.
   他做的第一件事就是打电话给他的父母。