Hastings, a professor in the UC Davis Department of Environmental Science and Policy, is one of the world's top experts in using mathematical models (sets of equations) to understand natural systems.

加州大学戴维斯分校环境科学与政策系教授黑斯廷斯，是世界上利用数学模型(方程组)来理解自然系统的顶级专家之一。

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Environmental Systems Engineering is one of the specialty basic courses in Environmental Science undergraduate education.

环境系统工程是环境科学本科教育的专业基础课。

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The key to realize an effective control on the industrialization in our country is to form 4 control systems: science and technology, population and employment, resources and environmental protection.

实现对我国工业化的有效调控，关键在于形成四大调控体系：科技调控、人口与就业调控、资源调控、环保调控。

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"Bob is the top of the top in tissue engineering, " says Bruce Hamilton , director of bioengineering and environmental systems at the National Science Foundation.

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