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①Astronautsalsousespecialshouers.Onehoseputsoutwaterandanothertakesinwater.Waterflyin...
①Astronauts also use special shouers.One hose puts out water and another takes in water.Water flying around inside is one of the most dangerous things for the machines.
②Things fly around in space so astronauts must do things differently. 展开
②Things fly around in space so astronauts must do things differently. 展开
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