NASA astronauts Kayla Barron, Raja Chari, former station commander Tom Marshburn and their European counterpart Matthias Maurer had been aboard the international space station since November.
美国宇航局宇航员Kayla Barron、Raja Chari、前空间站指挥官Tom Marshburn和他们的欧洲同行Matthias Maurer自11月以来一直在国际空间站上。