立志

例句：

1. 1. I have always set my heart on becoming an engineer.
   我一直立志成为一名工程师。
2. 2. She aspired to become a doctor after graduating from college.
   她在大学毕业后立志成为一名医生。
3. 3. He aims for excellence in everything he does.
   他立志在所做之事中追求卓越。