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1. Park naturalists 1. 公园自然学者 Park naturalists plan, develop, and conduct programs to inform public of historical, natural, and scientific features of national, state, or local park. 公园自然学者计划、创造和实行项目，向公众宣传关于国家公园，州立公园或地方公园的历史、自然和科学特点。 2. Archaeologist 2. 考古学家 Archaeologists conduct research to reconstruct record of past human life and culture from human remains, artifacts, architectural features, and structures recovered through excavation, underwater recovery, or other means of discovery. 考古学家的主要职责是通过调研重构古代人类生活与文化原貌，工作内容包括挖掘，水下工程或其他探索方法挖掘人类遗迹、史前器物、建筑特点和结构。 3. Anthropologists 3.人类学家 Anthropologists research, evaluate, and establish public policy concerning the origins of humans; their physical, social, linguistic, and cultural development; and their behavior, as well as the cultures, organizations, and institutions they have created. 人类学家主要进行研究调查，评估，并建立相关的公共政策。这些政策涵盖人类起源，物理学，社会学，语言学以及文化的发展等多个方面，同时也涉及人类的行为文化，机构组织等方面的研究。 | 
