River basin is a complex environmental system.

流域是一个复杂的环境系统。

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Complex environmental conditions on the mechanical properties of rock study provides some helpful ideas.

为复杂环境条件下对岩石的力学性能影响的研究提供了可借鉴的思路。

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This paper introduces the practice of demolishing an industrial house with frame structure in complex environmental conditions by controlled blasting.

介绍了采用控制爆破技术在复杂环境条件下拆除框架结构工业厂房的工程实践。

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As I discussed in my overview of hydroelectric power in 2008, the main barriers to new hydroelectric facilities are complex environmental studies, permitting issues, and water laws.

FORBES: Administration Lays the Groundwork for Hydropower Boom

Now to turn the tide on this epidemic, we must confront the complex social and environmental conditions that help fuel the HIV epidemic in African-American communities.

WHITEHOUSE: Office of National AIDS Policy Blog

Many Americans suffer from it, and it is most likely caused by a complex set of genetic and environmental factors, it says.

CNN: STORY HIGHLIGHTS