以下为句子列表：
英文: Some researchers, including Tim Parker of NASA's Jet Propulsion Laboratory in Pasadena and Jim Head of Brown University in Providence, Rhode Island, have suggested that much of the Martian northern hemisphere was once a vast ocean.
中文: 包括美国宇航局推进技术实验室的提姆·帕克，及坐落于罗得岛州首府普罗维登斯的布朗大学的吉姆·海德在内的一些学者认为火星北半球的大部分地区曾是一片汪洋。
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