居先的

例句：

1. 1. She was the first to arrive at the meeting.
   她最先到达会议。
2. 2. He is the best in his class, and he always comes first in exams.
   他是他班上最好的学生，考试总是名列前茅。
3. 3. The company's new CEO has made a lot of changes, and it's the first time they'vedone this.
   该公司新任CEO进行了大量改革，这是他们首次这样做。