Spacecraft Technician Billy Jones inspects the Phoenix Mars Lander robotic arm in 2006.

2006年，航天技术员比利·琼斯在检查“凤凰号”火星探测器的机械臂。

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The Mars lander, by contrast, would visit a place where the seas — plain water in this case — vanished long ago.

与之相比，火星着陆器将会拜访一个淡水（如果有水存在的话）早已消失的地方。

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The Cassini spacecraft brought a disk of signatures into orbit around Saturn.The Phoenix Mars Lander took DVD to Mars' north pole.

卡西尼号将一张储存有签名的DVD带到了土星轨道上，凤凰号火星探测器将一张DVD带到了火星的北极。

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"It has so much capability, so much more capability than any other vehicle, that I think we can start to contemplate missions like a Mars sample return, which requires a tremendous amount of lift capability because you've got to send a lander to Mars that still has enough propellant to return to Earth."

VOA: special.2011.04.11

Historically, only 33% of Mars lander missions have succeeded, and this landing was particularly complicated.

FORBES: Curiosity's Successful, Glorious Triumph on Mars

The half-billion-dollar Phoenix Mars Lander touched down on the planet Sunday night to begin at least three months of experiments.

NPR: Phoenix Sends Color Photos of Mars to NASA

There have been three successful Mars lander missions, the Viking 1 and Viking 2 in 1976, and the Pathfinder in 1997.

CNN: Mars Pathfinder enlisted in search for lost Polar Lander