Spacewalking astronauts installed an 88-million-dollar spectrograph designed to detect faint light from faraway quasar .
太空漫宇员安装8.8千万美元的,用于探测来自遥远类星体的微弱线。
Spacewalking astronauts installed an 88-million-dollar spectrograph designed to detect faint light from faraway quasar .
太空漫宇员安装8.8千万美元的,用于探测来自遥远类星体的微弱线。
Two spacewalking astronauts have been able to install a new camera in the Hubble Space Telescope.
两名太空走的宇员已经可以给哈勃望远镜安装新摄像机了。
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