Space suits don't just make astronauts (宇航员) look cool. Without these special suits, astronauts wouldn't be able to1 their spacecraft (宇宙飞船). That is to say, they wouldn't be able to walk on the 2 or work outside the International Space Station.
★3 do astronauts need to wear space suits?
Space is a4place for human beings. Firstly, there is no air to breathe (呼吸). Secondly, space also has high levels of radiation (辐射) that can pass 5 our bodies and make us sick. Thirdly, some parts of space are really 6 while other parts are very hot. So astronauts could die in just a few seconds if they stepped outside their spacecraft without their suits. With a space suit, astronauts can move around in 7 for several hours.
★What can a space suit do for an astronaut?
Space suits keep astronauts safely sealed (密封的) inside. A backpack sends O2 (氧气) in to let astronauts breathe 8. At the same time, the CO2 (二氧化碳) that astronauts breathe out is sucked away (吸走). The suit also 9 them from harmful radiation and fast-moving space dust. Under the space suit is another suit that looks like a pair of tight pajamas (睡衣) with little pipes (管子) running through them. Water runs through these pipes to 10 astronauts because wearing a space suit can make astronauts very hot!
