A new survey done in the country found that 27 percent of American teenagers chose to do fast-food service, 25 percent do lawn and park maintenance and 16 percent work in grocery stores.
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美国国家航空航天局戈达德太空飞行中心的绿地，市经营的望远镜。
NASA's Goddard Space Flight Center in Greenbelt, Md., manages the telescope.
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