Two Discovery astronauts head back outside this afternoon for an unplanned fourth space walk.
Two Discovery astronauts head back outside this afternoon for an unplanned fourth space walk.
两位探索者号宇航员于今天下午执行了事先未计划的第四次太空漫步。
Two Discovery astronauts head back outside this afternoon for an unplanned fourth space walk.
两位探索者号宇航员于今天下午执行了事先未计划的第四次太空漫步。