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1. 火星快车自2003年起就一直在环绕火星飞行。

   huǒ​xīng​kuài​chē zì2003 nián qǐ jiù yī​zhí zài huán​rào huǒ​xīng fēi​xíng.

   The Mars Express has been in orbit around Mars since 2003.

   Source: CCMatrix