That’s when the European Space Agency’s Mars Express Spacecraft flew by the tiny moon.

事情发生在欧洲航天局的火星快车号宇宙飞船飞经这颗小卫星期间。

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That's when the European Space Agency's Mars Express Spacecraft flew by the tiny moon.

事情发生在欧洲航天局的火星快车号宇宙飞船飞经这颗小卫星期间。

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In addition, Mars Global Surveyer, Mars Odyssey and ESA's Mars Express are still in orbit.

此外，火星环球探测火星奥德赛和欧空局的火星快车仍然在轨道上。

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Mars Express hopes to answer that question with two spacecraft that will work in tandem.

CNN: Mars Express leads interplanetary pack

Only Europe, which operates the Mars Express orbiter, has had beginner's luck on Mars.

MSN: History littered with failed Mars probes

Europe entered the Mars race in 2003 with the Mars Express Orbiter and the Beagle 2 lander.

CNN: What we've done on Mars, and what's next