We have learned and mastered space travel.
这时地球人已经学会并掌握了太空飞行。
Pioneer John Glenn was a pioneer in space travel.
约翰·格伦是太空飞行的先驱者。
Many companies are pursuing commercialized space travel.
许多公司在追求把太空旅行商业化。
2021-09-01
We have learned and mastered space travel.
这时地球人已经学会并掌握了太空飞行。
Pioneer John Glenn was a pioneer in space travel.
约翰·格伦是太空飞行的先驱者。
Many companies are pursuing commercialized space travel.
许多公司在追求把太空旅行商业化。