The theoretical dynamic simulation models for stationary flow and transient flow under the isothermal and non-isothermal condition are set up based on the three conservation equations.

以流体力学三大守恒方程为基础，建立了等温和非等温条件下的燃气管网稳态和动态仿真理论模型。

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The Smithsonian Conservation Biology Institute studies and cares for thirty-three kinds of animals there.

VOA: special.2010.06.22

It is part of a three-year conservation project which includes creating extra nesting habitats in the area.

BBC: Little tern

Massachusetts Gov. Deval Patrick, a Democrat, announced a plan in late June to reduce high energy costs in the state within the next three years through conservation measures.

CNN: Have we reached the energy tipping point?

The UNESCO Biosphere Reserve accreditation acknowledges the scientific, scenic, cultural and educational value of the area, and commits designations to the three goals of conservation, sustainable development and learning and research.

UNESCO: UK National Commission for UNESCO - Galloway and Southern Ayrshire Biosphere Reserve gives local people the chance to become Dark Sky Rangers