Throughout their mission there have always been spacecraft attached to the space station to get them - and the rest of those onboard - home if there was an emergency.
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「如果你不知道對方的意識型態或立場，而引起他不愉快的話，你自己也不會很舒服。尤其他還是你重視的朋友的話。」
露西·吉爾德（Lucy Gilder），BBC事實查核