第一的

例句：

1. 1. This is the first time I've ever seen this movie.
   这是我第一次看这部电影。
2. 2. The first thing he did was to call his mother.
   他首先做的是给他妈妈打电话。
3. 3. She was the first person to arrive at the airport.
   她是第一个到达机场的人。