The tests were carried out in a constant volume tunnel in which the flow velocity, the environmental density and its temperature can be changed.

试验在专门研制的可变流场速度、可变环境密度和可变环境温度的定容风洞中进行。

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Environmental stochasticity, This is a nondeterministic, unpredictable variation in the environmental conditions, resulting in a changing equilibrium density.

环境随机变化。环境条件非确定性的、不可预见性的变化会导致平衡密度的变化。

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Objective To establish Anopheles minimus density evaluation model based on climate, environmental and remote sensing data.

目的借助气象、环境与遥感监测指标建立微小按蚊密度评价模型。

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This growing population density has spawned a host of environmental issues and creative solutions.

FORBES: Japan's Green Gold Mine

The so-called New Urbanism movement emerged in the mid-90s and has been steadily gaining momentum, especially with rising energy costs, environmental concerns and health problems associated with what Leinberger calls "drivable suburbanism" -- a low-density built environment plan that emerged around the end of the World War II and has been the dominant design in the U.S. ever since.

CNN: Is America's suburban dream collapsing into a nightmare?