US, Russian Astronauts Return After 6-Month Space Station Mission(翻译)

cosmonaut – n. an astronaut in the space program of Russia or the former Soviet Union

mission - n. a job or project that someone is given to do

commercial - adj. related to or used in the buying and selling of goods and services

role - n. a part that someone or something has in an activity or situation

view - n. a way of thinking about something; the things that can be seen from a given area or place