宇航员克里斯蒂娜·科赫准备再次创造历史
NASA astronaut Christina Koch makes observations from the International space Station’s cupola. Koch has already made history once in her stay aboard the orbital laboratory. In October 2019 she was part of the first all-female spacewalk and now she is poised to make history again. On Dec. 28, 2019, she will break the record for the longest single space...