人体血液中 CO2 水平也在上升

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Watch: "I'm not going to speculate", says Marco Rubio on Cuba boat shooting

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They carried out an array of experiments on board the orbiting lab and conducted spacewalks, with Suni breaking the record for the woman who spent the most hours outside of the space station. And at Christmas, the team dressed in Santa hats and reindeer antlers - sending a festive message for a Christmas that they had originally planned to spend at home.

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