n.宇航员，航天员

原形：astronaut复数：astronauts

For instance, astronauts lose bone mass.
例如，宇航员会失去骨量。
I want to be a astronaut when I grow up.
我长大想成为一名航天员。
An astronaut took it from space.
一个宇航员从太空拍摄的。
The astronaut floated weightlessly in the zero-gravity environment of space.
宇航员在太空的失重环境中飘浮。
She became the first woman to walk on the moon as an astronaut for NASA.
她作为NASA的宇航员，成为首位登上月球的女性。
Astronauts undergo rigorous physical and mental training before space missions.
宇航员在执行太空任务前要接受严格的身心训练。
After a long journey, the exhausted astronaut finally returned to Earth.
经过长途旅行后，疲惫的宇航员终于返回了地球。
Astronauts must adhere to strict diet plans to maintain their health in space.
宇航员必须严格遵守饮食计划以保持健康。
They experienced a thrilling launch sequence before becoming astronauts.
他们在成为宇航员之前经历了激动人心的发射过程。
The astronaut's daily routine involves scientific experiments and physical exercise.
宇航员的日程包括科学实验和体育锻炼。
Many aspiring astronauts dream of traveling to Mars one day.
许多有抱负的宇航员梦想有一天能去火星旅行。
Astronauts often face unforeseen challenges during their space missions.
宇航员在太空任务中经常面临意想不到的挑战。
After retirement, some astronauts become motivational speakers or authors.
退休后，一些宇航员成为了励志演说家或作家。