Noun:

1. any kind of physical activity outside a spacecraft by one of the crew

spacelabn.太空实验室spacen.空间；处所；太空；空地；空闲；空格；间隙v.留间隔；分隔；走神；忘记space criterion空间尺度space technolgy航天技术space metallurgy宇宙冶金space experience空间体验space production空间生产space experiment航天试验space-time TMR时空三模冗余space of Fontana丰塔纳间隙space transducer航天传感器Space characters空间特征

1. Two spacewalking astronauts have been able to install a new camera in the Hubble Space Telescope.At first, they had trouble removing the old camera because of a stubborn bolt.
   两名在空间行走的宇航员，现已可以在哈勃望远镜上安装新的摄像机，起初，因为一些不灵活的螺钉给去掉旧的摄像机造成困难。