How I wish I could become an astronaut one day.
astronaut: [ 'æstrəno:t ]
n. 宇航员

例句与用法:
1. A rocket manned by trained astronauts will launch soon.
载有受过训练的宇航员的火箭马上就要发射了.
2. My son's dream is to be an astronaut.
我儿子的理想是当宇航员.
3. The astronaut can send out a robot which will work on the unknown plant, collecting rocks and minerals, putting up a permanent observation station or traveling far and wide.
宇航员可以派出机器人在这颗陌生的行星上工作,收集岩石和矿物；建立永久性观察站,或向四面八方走动.
4. The astronaut accepted danger was part of the job.
太空人承认他们的工作中包含著危险.