|Planet 51 is a galactic-sized animated alien adventure comedy revolving around American astronaut Captain Charles Chuck Baker (voiced by Dwayne Johnson), who lands on Planet 51 thinking he's the first person to step foot on it. To his surprise, he finds that this planet is inhabited by little green people who are happily living in a white picket fence world reminiscent of a cheerfully innocent 1950s America, and whose only fear is that it will be overrun by alien invaders...like Chuck! With the help of his robot companion "Rover" and his new friend Lem, Chuck must navigate his way through the dazzling, but bewildering, landscape of Planet 51 in order to escape becoming a permanent part of the Planet 51 Alien Invaders Space Museum.
||《第51号星球》是一部以银河系为背景的外星人动画冒险喜剧。故事围绕着一个美国宇航员Charles Chuck Baker船长（德韦恩·约翰逊 配音）展开。Chuck在第51号星球上着陆，他本以为自己是第一个踏足该星球的人类。结果他吃惊地发现，这颗行星上早就存在着居民。这些小绿人幸福地生活在白色木栅栏围起的家园里，他们的世界令人联想起美国快乐纯真的五十年代。他们唯一的担忧就是像Chuck一样的外星人入侵他们的星球。在机器人伙伴Rover和新朋友Lem的帮助下，Chuck必须穿越51号星球上令人目眩神迷的景色，以避免成为该星球外星入侵者博物馆的永久性展品。
|Lem (voiced by Justin Long) is just an average teenager working on getting the girl and furthering his career at the local planetarium -- except that he's an alien. The media on this planet has tagged spacemen as brain-eating, zombie-creating monsters, causing Chuck to run for his life and into Lem's house. Now it's up to the green native to get the clumsy astronaut back to his spaceship before military dictator General Grawl and mad scientist Professor Kipple manage to exterminate the Earthly visitor.
|At great peril to himself, Lem continues to try and help Chuck. With the help of a few of Lem's friends and Chuck's trusty pal Rover, they just might succeed, and if Chuck can put aside his grand vision of himself, he just might be able to teach the inhabitants of Planet 51 a thing or two about what lies beyond.
（China.org.cn 李潇 译）