环保机构地球观察研究院经营可以亲自参与的项目，他们将观光客和研究动物和环境的科学家组成一队。
The Earthwatch Institute, an environmental organization, runs hands-on programs, teaming tourists with research scientists studying animals and the environment.
环保机构地球观察研究院经营可以亲自参与的项目，他们将观光客和研究动物和环境的科学家组成一队。
The Earthwatch Institute, an environmental organization, runs hands-on programs, teaming tourists with research scientists studying animals and the environment.
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