Part 1 Warming up B Mir/peace和平号 cosmonaut astronaut 冬re-entry重返 collision microbe细菌、微生物 flawlessPart 1 Warming up B ❖ Mir/peace 和平号 ❖ cosmonaut = astronaut ❖ re-entry重返 ❖ collision ❖ microbe细菌、微生物 ❖ flawless