The delays forced NASA officials to shorten the shuttle's mission by one day and eliminate one space walk.

VOA: standard.2009.03.15

The extended-through-space train I pick out at the end of our walk is the same as the extended-through-space train that I picked out at the beginning of our walk.

走到末尾的时候,我谈到的贯穿空间的火车,和一开始我谈到的,是同一辆。

耶鲁公开课 - 死亡课程节选

During the two-and-a-half hour moon walk, the astronauts frolicked in the weightlessness of outer space and planted an American flag in the lunar surface.

VOA: standard.2009.07.16

Astronaut Bobby Satcher became the second African-American to space walk.

VOA: standard.2010.02.02

But earlier,Buzz Aldrin the second man to walk on the moon took part in a NASA news conference where he pushed for a new round of space exploration, with the goal of sending astronauts to Mars.

VOA: standard.2009.07.20