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.
就有限的地球而论，对科学家们的最重大挑战，或许是涉及能源使用和其对生活环境冲击的问题。
On the "limited earth," perhaps the most important challenges for scientists are problems related to the use of energy and the impact on our living environment.
科学家还希望通过该实验找出适合在严酷环境下生长的土豆种类，来帮助解决地球人口饥饿和营养不良的难题。
The scientists hope the experiment will also help address the earthly scourges of hunger and malnutrition by identifying varieties suited to growing in harsh conditions.
氡的释放和运移规律及机制研究是氡气测量的基础理论问题，它与氡在地球科学、环境科学等领域的广泛应用密切相关。
The study of radon release and migration is the basic theoretical issue for radon measurement, which has close relationship with extensive applications in geoscience, environmental science and so on.
氡的释放和运移规律及机制研究是氡气测量的基础理论问题，它与氡在地球科学、环境科学等领域的广泛应用密切相关。
The study of radon release and migration is the basic theoretical issue for radon measurement, which has close relationship with extensive applications in geoscience, environmental science and so on.
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